Plywood Manufacturing Defects categories

Norms of restrictions of plywood processing defects

Description of the defects
. Beads from side plates (traces of side plates)
. Biological defects (wormholes)
. Blisters, delamination, bark
. Closed cracks
. Color defects with partial wood defects
a. Dead knots, falling out knots, holes from fallen out knots (without bark)
. Dents
. Deviations in wood structure (curly-grain, burl)
. Deviations in wood structure (eyes)
. Double plug repair
. Edge defects because of grinding, cuts (edging), veneer shortage
. Glue seepage
. Glue thread
. Grinding of outer layers
. Inserted glued veneer parts
. Knots with bark inclusions, holes from fallen out knots
a. Live sound knots (light and dark)
. Manufacturing stains (beam traces, lines)
. Mechanical damage (splits, kerfs)
. Metal inclusions
. Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
a. Open splits, open seam on spliced veneer
b. Open splits, open seam on spliced veneer
c. Open splits, open seam on spliced veneer
. Overlapping
. Partially intergrown knots
. Pin knot
. Plug repair
. Pocket (without bark)         )
. Rippling (for sanded plywood), roughness of sawn surface         )
. Sander skips (non-uniform sanding)         )
. Scratches, scars, pimples, ridges         )
. Scuffleness non-smooth         )
. Sound color changes (false core)         )
. Sound color changes (mottles)         )
. Sound color changes (stringers, traces of stringers)         )
. Sound color changes (veins groups)         )
. Split repair with patches or plug repairs         )
. Warpage             )
. Wood defects (open inbark)             )
. Wood structure defects (grown together light and dark bark pocket)             )
Allowable and not allowable defects

Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light ones with diameter up to        mm with chap up to    .    mm,
pcs/m    are allowable.
GRADE B/ALLOWABLE DEFECTS

Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light ones are allowable the length up to           mm, width up to     mm,     pcs/m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
The light one is allowable the length up to           mm, width up to     mm,     pcs/m   .
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
GRADE B/ALLOWABLE DEFECTS

Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
The light ones       х       mm are allowable,     per m   .
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
GRADE B/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Only light bark pocket is allowable, dark bark pocket is allowable in the size
and in the number among black knots.
GO TO DEFECT DESCRIPTION

GRADE B/NOT ALLOWABLE DEFECTS
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Double plug repair GO TO DEFECT DESCRIPTION
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Glue seepage GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION

GRADE B/NOT ALLOWABLE DEFECTS
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Metal inclusions GO TO DEFECT DESCRIPTION
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Overlapping GO TO DEFECT DESCRIPTION
Plug repair GO TO DEFECT DESCRIPTION
Pocket (without bark) GO TO DEFECT DESCRIPTION
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION

GRADE B/NOT ALLOWABLE DEFECTS
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION

GRADE S/ALLOWABLE DEFECTS
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.

GRADE S/ALLOWABLE DEFECTS
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with diameter up to        mm with chap up to    .    mm,
pcs/m    are allowable.
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.

GRADE S/ALLOWABLE DEFECTS
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
The light ones       х       mm are allowable,     per m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
The light one is allowable the length up to           mm, width up to     mm,     pcs/m   .
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light ones are allowable the length up to           mm, width up to     mm,     pcs/m   .
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable     mm from the edge.
Plug repair GO TO DEFECT DESCRIPTION
pcs/m    is allowable with color and grain flow match.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.

Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Wood structure defects (grown together light
and dark bark pocket)
Only light bark pocket is allowable, dark bark pocket is allowable in the size
and in the number among black knots.
GO TO DEFECT DESCRIPTION
GRADE S/ALLOWABLE DEFECTS

GRADE S/NOT ALLOWABLE DEFECTS
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Double plug repair GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION

GRADE S/NOT ALLOWABLE DEFECTS
Metal inclusions GO TO DEFECT DESCRIPTION
Overlapping GO TO DEFECT DESCRIPTION
Pocket (without bark) GO TO DEFECT DESCRIPTION
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION

Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable excluding dark eyes.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to     mm,     pcs/m   .
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
GRADE B Sel/ALLOWABLE DEFECTS

GRADE B Sel/ALLOWABLE DEFECTS
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light ones are allowable the length up to           mm, width up to     mm,     pcs/m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
The light one is allowable the length up to           mm, width up to     mm,     pcs/m   .
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.

GRADE B Sel/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Only light bark pocket is allowable, dark bark pocket is allowable in the size
and in the number among black knots.
GO TO DEFECT DESCRIPTION

GRADE B Sel/NOT ALLOWABLE DEFECTS
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Double plug repair GO TO DEFECT DESCRIPTION
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Glue seepage GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION

GRADE B Sel/NOT ALLOWABLE DEFECTS
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Metal inclusions GO TO DEFECT DESCRIPTION
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Overlapping GO TO DEFECT DESCRIPTION
Plug repair GO TO DEFECT DESCRIPTION

GRADE B Sel/NOT ALLOWABLE DEFECTS
Pocket (without bark) GO TO DEFECT DESCRIPTION
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION

Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable excluding dark eyes.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to     mm,     pcs/m   .
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
GRADE S Sel/ALLOWABLE DEFECTS

GRADE S Sel/ALLOWABLE DEFECTS
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable on    % of sheet area.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
The light one is allowable the length up to           mm, width up to     mm,     pcs/m   .
Plug repair GO TO DEFECT DESCRIPTION
pcs/m    is allowable with color and grain flow match.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.

GRADE S Sel/ALLOWABLE DEFECTS
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light ones are allowable the length up to           mm, width up to     mm,     pcs/m   .
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
The light ones       х       mm are allowable,     per m   .
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Wood structure defects (grown together light
and dark bark pocket)
Only light bark pocket is allowable, dark bark pocket is allowable in the size
and in the number among black knots.
GO TO DEFECT DESCRIPTION

GRADE S Sel/NOT ALLOWABLE DEFECTS
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Double plug repair GO TO DEFECT DESCRIPTION
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Glue seepage GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION

GRADE S Sel/NOT ALLOWABLE DEFECTS
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Metal inclusions GO TO DEFECT DESCRIPTION
Overlapping GO TO DEFECT DESCRIPTION
Pocket (without bark) GO TO DEFECT DESCRIPTION
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION

GRADE S Sel/NOT ALLOWABLE DEFECTS
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION

Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable length is up to           mm; width is up to        mm, or     pcs/sheet.
GRADE BB/ALLOWABLE DEFECTS

Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable not more than       % of sheets in pack.
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with diameter up to        mm with chap up to     mm,
pcs/m    are allowable.
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable max     pcs/m   .
GRADE BB/ALLOWABLE DEFECTS

Plug repair GO TO DEFECT DESCRIPTION
pcs/m    is allowable with color and grain flow match.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among intergrown knots with diameter up to        mm,        pcs/m   .
Overlapping GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (with false core).
GRADE BB/ALLOWABLE DEFECTS

Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light and dark ones are allowable the length up to           mm,
width up to        mm,        pcs/m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to        mm,        pcs/m   .
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable     mm from the edge.
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable in size of group stringers (      x       mm)     pcs/m   .
GRADE BB/ALLOWABLE DEFECTS

Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Splits over     mm shall be filled with veneer sheet insertions with glue.
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
The light ones       х       mm are allowable,     per m   .
GRADE BB/ALLOWABLE DEFECTS

GRADE BB/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Metal inclusions GO TO DEFECT DESCRIPTION
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION

Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable among black knots with diameter up to     mm,     pcs/m   .
Closed cracks GO TO DEFECT DESCRIPTION
Allowable the length up to           mm,     pcs/m of sheet width.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable length is up to           mm; width is up to        mm, or     pcs/sheet.
GRADE BBx/ALLOWABLE DEFECTS

Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable not more than       % of sheets in pack.
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with diameter up to        mm with chap up to     mm,
pcs/m    are allowable.
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.
GRADE BBx/ALLOWABLE DEFECTS

Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable in size of group stringers (      x       mm)     pcs/m   .
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among intergrown knots with diameter up to        mm,        pcs/m   .
Overlapping GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (with false core).
GRADE BBx/ALLOWABLE DEFECTS

Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
The light ones       х       mm are allowable,     per m   .
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
The light and dark ones are allowable the length up to           mm,
width up to        mm,        pcs/m   .
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to        mm,        pcs/m   .
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable     mm from the edge.
GRADE BBx/ALLOWABLE DEFECTS

GRADE BBx/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.

GRADE BBx/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Dents GO TO DEFECT DESCRIPTION
Double plug repair GO TO DEFECT DESCRIPTION
Glue thread GO TO DEFECT DESCRIPTION
Grinding of outer layers GO TO DEFECT DESCRIPTION
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Metal inclusions GO TO DEFECT DESCRIPTION
Plug repair GO TO DEFECT DESCRIPTION

GRADE BBx/NOT ALLOWABLE DEFECTS
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION

Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dents GO TO DEFECT DESCRIPTION
Allowable height (depth) is up to    .    mm, length is up to           mm, and width is up to        mm.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to     mm and without number limitations.
Closed cracks GO TO DEFECT DESCRIPTION
Edge and medial ones are allowable without number limitation.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable length is up to           mm; width is up to        mm, or     pcs/sheet.
GRADE CP/ALLOWABLE DEFECTS

Grinding of outer layers GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).
Glue thread GO TO DEFECT DESCRIPTION
Allowable
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to       % of sheet area (for thickness        mm and above).
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable without number limitation but not in color and orientation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
GRADE CP/ALLOWABLE DEFECTS

Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (with false core).
Metal inclusions GO TO DEFECT DESCRIPTION
Nonferrous metals staples are allowable.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with no limitation in diameter with chap up to     mm
are allowable.
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Allowable length is up to           mm, width is up to        mm;     pcs per sheet.
GRADE CP/ALLOWABLE DEFECTS

GRADE CP/ALLOWABLE DEFECTS
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable
Plug repair GO TO DEFECT DESCRIPTION
Insertions with gap on one side up to     mm (or on both sides    .    mm)
are allowable without number limitation but not in color and orientation.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among intergrown knots with diameter up to        mm,        pcs/m   .
Overlapping GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Allowable the length up to           mm, width up to     mm, providing patching with mastic.

GRADE CP/ALLOWABLE DEFECTS
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Allowable height (depth) is up to    .    mm, length is up to           mm, width is up to        mm.
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Allowable

GRADE CP/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Splits over     mm shall be filled with veneer sheet insertions with glue.
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Allowable without limitations.
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE CP/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION

Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dents GO TO DEFECT DESCRIPTION
Allowable width is up to           mm.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm,     pcs/m   .
Closed cracks GO TO DEFECT DESCRIPTION
Edge and medial ones are allowable without number limitation.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable width is up to        mm.
GRADE WG/ALLOWABLE DEFECTS

Grinding of outer layers GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).
Glue thread GO TO DEFECT DESCRIPTION
Allowable
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (for     to        mm thickness).
Allowable up to       % of sheet area (for thickness        mm and above).
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable without number limitation but not in color and orientation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
GRADE WG/ALLOWABLE DEFECTS

Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (with false core).
Metal inclusions GO TO DEFECT DESCRIPTION
Nonferrous metals staples are allowable.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with no limitation in diameter and number are allowable.
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Allowable length is up to           mm, width is up to        mm;     pcs per sheet.
GRADE WG/ALLOWABLE DEFECTS

GRADE WG/ALLOWABLE DEFECTS
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable
Plug repair GO TO DEFECT DESCRIPTION
Insertions are allowable without number limitation but not in color and orientation.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among intergrown knots with diameter up to        mm,        pcs/m   .
Overlapping GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.

GRADE WG/ALLOWABLE DEFECTS
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Allowable width is up to           mm.
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Allowable

GRADE WG/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Splits over     mm shall be filled with veneer sheet insertions with glue.
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Allowable without limitations.
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE WG/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION

Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dents GO TO DEFECT DESCRIPTION
Allowable height (depth) is up to    .    mm, length is up to           mm, and width is up to        mm.
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to     mm and without number limitations.
Closed cracks GO TO DEFECT DESCRIPTION
Edge and medial ones are allowable without number limitation.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable length is up to           mm; width is up to        mm, or     pcs/sheet.
GRADE WGE/ALLOWABLE DEFECTS

Grinding of outer layers GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).
Glue thread GO TO DEFECT DESCRIPTION
Allowable
Glue seepage GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to       % of sheet area (for thickness        mm and above).
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to     mm along the edge.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable without number limitation but not in color and orientation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
GRADE WGE/ALLOWABLE DEFECTS

Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area (with false core).
Metal inclusions GO TO DEFECT DESCRIPTION
Nonferrous metals staples are allowable.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with no limitation in diameter with chap up to     mm are allowable.
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Allowable length is up to           mm, width is up to        mm;     pcs per sheet.
GRADE WGE/ALLOWABLE DEFECTS

GRADE WGE/ALLOWABLE DEFECTS
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable among intergrown knots with diameter up to        mm,        pcs/m   .
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable
Plug repair GO TO DEFECT DESCRIPTION
Insertions with gap on one side up to     mm (or on both sides    .    mm)
are allowable without number limitation but not in color and orientation.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Overlapping GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Allowable the length up to           mm, width up to     mm, providing patching with mastic.

GRADE WGE/ALLOWABLE DEFECTS
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Allowable height (depth) is up to    .    mm, length is up to           mm, width is up to        mm.
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Allowable

GRADE WGE/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Splits over     mm shall be filled with veneer sheet insertions with glue.
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Allowable without limitations.
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE WGE/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION

Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
Dents GO TO DEFECT DESCRIPTION
Allowable
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and without number limitations.
Closed cracks GO TO DEFECT DESCRIPTION
Edge and medial ones are allowable without number limitation.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable without limitations.
GRADE C/ALLOWABLE DEFECTS

Grinding of outer layers GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.
Glue thread GO TO DEFECT DESCRIPTION
Allowable
Glue seepage GO TO DEFECT DESCRIPTION
Allowable
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to        mm.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable without number limitation but not in color and orientation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
GRADE C/ALLOWABLE DEFECTS

Metal inclusions GO TO DEFECT DESCRIPTION
Nonferrous metals staples are allowable.
Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with no limitation in diameter and number are allowable.
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and no limitations in number
(bark patch inclusions are allowable nearby knot with width     mm).
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Allowable
GRADE C/ALLOWABLE DEFECTS

GRADE C/ALLOWABLE DEFECTS
Plug repair GO TO DEFECT DESCRIPTION
Insertions are allowable without number limitation but not in color and orientation.
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and without number limitations.
Overlapping GO TO DEFECT DESCRIPTION
Allowable without limitation.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable the length up to           mm, width up to        mm, without number limitations.
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE C/ALLOWABLE DEFECTS
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Allowable
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable up to       % of sheet area.
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Allowable
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable

GRADE C/ALLOWABLE DEFECTS
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Allowable
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Allowable without limitations.
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE C/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION

GRADE C/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION
Color defects with partial wood defects GO TO DEFECT DESCRIPTION

Dents GO TO DEFECT DESCRIPTION
Allowable
Dead knots, falling out knots, holes from fallen out knots
(without bark)
GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and without number limitations.
Color defects with partial wood defects GO TO DEFECT DESCRIPTION
Allowable in the form of separate strips with width not more than        mm,
length up to           mm,     pcs/m of sheet length.
Closed cracks GO TO DEFECT DESCRIPTION
Edge and medial ones are allowable without number limitation.
Biological defects (wormholes) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Beads from side plates (traces of side plates) GO TO DEFECT DESCRIPTION
Allowable without limitations.
GRADE CC/ALLOWABLE DEFECTS

Glue thread GO TO DEFECT DESCRIPTION
Allowable
Glue seepage GO TO DEFECT DESCRIPTION
Allowable
Edge defects because of grinding,
cuts (edging), veneer shortage
GO TO DEFECT DESCRIPTION
Allowable width is up to        mm.
Double plug repair GO TO DEFECT DESCRIPTION
Allowable without number limitation but not in color and orientation.
Deviations in wood structure (eyes) GO TO DEFECT DESCRIPTION
Allowable without number limitation.
Deviations in wood structure (curly-grain, burl) GO TO DEFECT DESCRIPTION
Allowable with no limitation.
GRADE CC/ALLOWABLE DEFECTS

Mechanical damage (splits, kerfs) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.
Manufacturing stains (beam traces, lines) GO TO DEFECT DESCRIPTION
Allowable
Live sound knots (light and dark) GO TO DEFECT DESCRIPTION
Light and dark ones with no limitation in diameter and number are allowable.
Knots with bark inclusions, holes from fallen out knots GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and no limitations in number
(bark patch inclusions are allowable nearby knot with width     mm).
Inserted glued veneer parts GO TO DEFECT DESCRIPTION
Allowable
GRADE CC/ALLOWABLE DEFECTS
Grinding of outer layers GO TO DEFECT DESCRIPTION
Allowable up to    % of sheet area.

GRADE CC/ALLOWABLE DEFECTS
Pin knot GO TO DEFECT DESCRIPTION
Allowable with no limitation in sizes and number.
Partially intergrown knots GO TO DEFECT DESCRIPTION
Allowable with diameter up to        mm and without number limitations.
Overlapping GO TO DEFECT DESCRIPTION
Allowable without limitation.
Open splits, open seam on spliced veneer GO TO DEFECT DESCRIPTION
Allowable with the width up to        mm, without number limitations.
Mineral streaks, sap stains (bluestain, color sap spots),
color change at wood storage
GO TO DEFECT DESCRIPTION
Allowable without limitation.
Metal inclusions GO TO DEFECT DESCRIPTION
Nonferrous metals staples are allowable.

GRADE CC/ALLOWABLE DEFECTS
Scuffleness non-smooth GO TO DEFECT DESCRIPTION
Allowable
Scratches, scars, pimples, ridges GO TO DEFECT DESCRIPTION
Allowable
Sander skips (non-uniform sanding) GO TO DEFECT DESCRIPTION
Allowable
Rippling (for sanded plywood), roughness of sawn surface GO TO DEFECT DESCRIPTION
Allowable
Pocket (without bark) GO TO DEFECT DESCRIPTION
Allowable
Plug repair GO TO DEFECT DESCRIPTION
Insertions are allowable without number limitation but not in color and orientation.

GRADE CC/ALLOWABLE DEFECTS
Warpage GO TO DEFECT DESCRIPTION
It is not considered in plywood with width up to    .    mm; it is allowable
with width over    .    mm not more than        mm by     m of sheet diagonal length.
Split repair with patches or plug repairs GO TO DEFECT DESCRIPTION
Allowable
Sound color changes (veins groups) GO TO DEFECT DESCRIPTION
Allowable without limitations.
Sound color changes (stringers, traces of stringers) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Sound color changes (mottles) GO TO DEFECT DESCRIPTION
Allowable without limitation.
Sound color changes (false core) GO TO DEFECT DESCRIPTION
Allowable without limitation.

GRADE CC/ALLOWABLE DEFECTS
Wood structure defects (grown together light
and dark bark pocket)
Light bark pocket is allowable, dark bark pocket is allowable
in the size of intergrown knots.
GO TO DEFECT DESCRIPTION
Wood defects (open inbark) GO TO DEFECT DESCRIPTION
It is allowable within the total number in accordance with the norms for black knots.

GRADE CC/NOT ALLOWABLE DEFECTS
Blisters, delamination, bark GO TO DEFECT DESCRIPTION

. BEADS FROM SIDE PLATES (TRACES OF SIDE PLATES)
Bead means a local thickening caused by overlapping of the inner layers of veneer sheet.
Both length and width shall be measured.
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable length
is up to           mm;
width is up to        mm,
or     pcs/sheet.
СР, WGE
Allowable length
is up to           mm;
width is up to        mm,
or     pcs/sheet.
WG
Allowable
width is up to        mm.

Allowable
without limitations.
bead

. BIOLOGICAL DEFECTS
(WORMHOLES)
В, S,     , S     ,     ,
It is allowable within the total number
in accordance with the norms for black knots.
Wormhole means channels or holes left in the timber by insects or larvae.
Wormhole shall be measured at the part with largest diameter.

Blister is local plywood surface bulging due to delamination.
Delamination is separation of two adjacent veneer sheet layers along glue line.
Bark is part of bark or bast remaining on veneer sheet area.
. BLISTERS, DELAMINATION, BARK
В, S,     , S     ,     ,
Not allowable
Blister Delamination
Bark

, S Sel
Allowable the length
up to           mm,
pcs/m of sheet width.
В, S
Allowable the length
up to           mm,
pcs/m of sheet width.
ВВ, ВВx
Allowable the length
up to           mm,
pcs/m of sheet width.
,
Edge and medial ones
are allowable without
number limitation.
. CLOSED CRACKS
Closed shake is a chap with width not more than    .    mm.
Closed shake is measured on maximal length and width.
mm

. COLOR DEFECTS WITH PARTIAL
WOOD DEFECTS
Non sound color change means undue in color wood parts with reducing of hardness caused by wood-destroying fungi.

Allowable in the form of separate strips
with width not more than        mm,
length up to           mm,
pcs/m of sheet length.
B, S, B Sel, S Sel, BB, BBx, CP, WG, WGE, С
Not allowable

a. DEAD KNOTS, FALLING OUT KNOTS,
HOLES FROM FALLEN OUT KNOTS (WITHOUT BARK)
Black knot is a knot without intergrowth of annual rings with surrounding wood or intergrowth along less
than    /    of knot size perimeter.
Fallen out knot is a knot without intergrowth with surrounding wood and tightly standing in it.
, S Sel
Allowable with diameter
up to     mm,
pcs/m   .
В, S, ВВ, ВВх
Allowable among black
knots with diameter
up to     mm,
pcs/.m   .
CP, WGE
Allowable with diameter
up to     mm and without
number limitations.
WG
Allowable with diameter
up to        mm,
pcs/m   .
mm
Fallen out knot
mm
Hole of fallen out knot Hole of fallen out knot
mm

Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
С
Allowable with diameter
up to        mm and without
number limitations.
СC
Allowable with diameter
up to        mm and without
number limitations.
mm
mm
b. DEAD KNOTS, FALLING OUT KNOTS,
HOLES FROM FALLEN OUT KNOTS (WITHOUT BARK)
Black knot is a knot without intergrowth of annual rings with surrounding wood or intergrowth along less
than    /    of knot size perimeter.
Fallen out knot is a knot without intergrowth with surrounding wood and tightly standing in it.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.

. DENTS
Dent means a local denting of the external layer.
Dent length, width and depth shall be measured.
В, S,     , S
Not allowable
СР, WGE
Allowable height (depth)
is up to    .    mm,
length is up to           mm,
and width is up to        mm.
WG
Allowable width
is up to           mm.

Allowable
Dent Dent caused by gum

. DEVIATIONS IN WOOD STRUCTURE
(CURLY-GRAIN, BURL)
Curly-grain is curved or disordered arrangement of wood fibers.
Burl is local curvature of annual rings caused by knots and bark pockets.
Curly-grain, eyes and burls are not measured. Their presence is registered as assortment making feature.
Allowable all sorts with no limitation.
Curly-grain Burl

. DEVIATIONS IN WOOD STRUCTURE
(EYES)
Eyes mean traces of non-deferred shoots. Eyes diameter is not more than     mm.
Dark eyes mean eyes with much darker wood than surrounding wood.
Light eyes mean eyes with wood color similar to surrounding wood.
Group eyes mean eyes grouped by three or more and separated in not more than        mm.
, S Sel
Allowable
excluding dark eyes.
В, S, ВВ, ВВx,     ,
Allowable without number limitation.
Light eye Group light eyes Dark eye
Curly-grain, eyes and burls are not measured. Their presence is registered as assortment making feature.

. DOUBLE PLUG REPAIR
ВВ
Allowable
max     pcs/m   .
,
Allowable without number
limitation but not in color
and orientation.
B, S, B Sel, S Sel, BBx
Not allowable

Veneer shortage means a defect characterized by lack of part of the veneer sheet in the plywood.
Edging means continuous or discontinuous area on the edge of the plywood with not completely separated wood fibers.
Edge defects because of grinding, cuts, veneer shortage measured along the max distance from the defect
to the plywood sheet edge.
. EDGE DEFECTS BECAUSE OF GRINDING, CUTS (EDGING),
VENEER SHORTAGE
В,     , S Sel
Not allowable
S, ВВ, ВВx,
Allowable width
is up to     mm along the edge.
С
Allowable width
is up to        mm.

Allowable width
is up to        mm.
Veneer shortage Veneer shortage
Veneer shortage in the inner layers Shatters (defect due to cutting)

. GLUE SEEPAGE
Glue seepage is a defect in the form of strips and spots on plywood surface caused by glue penetration
from lower glue layer.
It is determined as sum of separate spots squares on plywood surface to whole sheet area.
В,     , S Sel
Not allowable
S
Allowable
up to    % of sheet area.
ВВ, ВВx
Allowable up to    % of sheet area
(for     to        mm thickness).
Allowable up to    % of sheet area
(for thickness        mm and above).
СР, WGE
Allowable up to    % of sheet area
(for     to        mm thickness).
Allowable up to       % of sheet area
(for thickness        mm and above).
WG
Allowable up to       % of sheet area (for     to        mm thickness).
Allowable up to       % of sheet area (for thickness        mm and above).

Allowable
seepage over plug

В, S, B Sel, S
Not allowable
,
Allowable
. GLUE THREAD
glue thread

. GRINDING OF OUTER LAYERS
В, S,     , S
Not allowable

Allowable up to    % of sheet area (for     to        mm thickness).
Allowable up to    % of sheet area (for thickness        mm and above).

Allowable
up to    %
of sheet area.
Grinding of outer layers is local removing of veneer sheet external layer to glue layer.
Measured along the length and width of the area of their location, and shall be expressed in percentage
of the plywood sheet square.
Grinding on MR-glue plywood Grinding on WBP plywood

. INSERTED GLUED VENEER PARTS
Inserted glued veneer parts mean parts of veneer sheet glued (pressed) on plywood surface.
Patched parts are measured by length and width.
В, S,     , S
Not allowable

Allowable length is up to           mm,
width is up to        mm;
pcs per sheet.

Allowable

. KNOTS WITH BARK INCLUSIONS, HOLES FROM FALLEN OUT KNOTS
Inbark is part of bark remaining on knot surface.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
mm
Knot with inbark
inbark
mm
CC
Allowable with diameter up to        mm
and no limitations in number
(bark patch inclusions are allowable
nearby knot with width     mm).
С
Allowable with diameter up to        mm
and no limitations in number
(bark patch inclusions are allowable
nearby knot with width     mm).
B, S, B Sel, S Sel, BB, BBx, CP, WG, WGE
Not allowable

a. LIVE SOUND KNOTS (LIGHT AND DARK)
Light knot
mm
Light knot
mm
Dark knot
split up to    .    mm
Intergrown knot is a knot with annual rings intergrown with surrounding wood along not less than    /    of knot
section perimeter.
Sound knot is a knot with wood free of dote.
Light sound knot is a sound knot with light wood similar in color to surrounding wood.
Dark sound knot is a sound knot with wood much darker than surrounding wood, richly saturated with tar, tanning
and heart materials, often with mottling.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
, S Sel
Not allowable
В
Light ones
with diameter up to        mm
with chap up to    .    mm,
pcs/m    are allowable.
S
Light and dark ones
with diameter up to        mm
with chap up to    .    mm,
pcs/m    are allowable.

СР, WGE
Light and dark ones
with no limitation in diameter
with chap up to     mm are allowable.
WG,
Light and dark ones
with no limitation in diameter
and number are allowable.
ВВ, ВВx
Light and dark ones
with diameter up to        mm
with chap up to     mm,
pcs/m    are allowable.
mm
Light knot
mm
Dark knot with chap Dark intergrown knot
split up to     mm

b. LIVE SOUND KNOTS (LIGHT AND DARK)
Intergrown knot is a knot with annual rings intergrown with surrounding wood along not less than    /    of knot
section perimeter.
Sound knot is a knot with wood free of dote.
Light sound knot is a sound knot with light wood similar in color to surrounding wood.
Dark sound knot is a sound knot with wood much darker than surrounding wood, richly saturated with tar, tanning
and heart materials, often with mottling.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
Notch is a trace of cutter on material surface.
Determined as assortment making feature.
. MANUFACTURING STAINS
(BEAM TRACES, LINES)
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable not more
than       % of sheets in pack.
,
Allowable
notch beam traces (lines)

. MECHANICAL DAMAGE (SPLITS, KERFS)
Split is local damage by sharp object.
Kerf is local damage in sawing process.
Breaking out is surface cavity due to local wood removing during processing.
The largest diameter of pinhole is measured.
В, S,     , S     ,     ,
It is allowable within the total number
in accordance with the norms for black knots.
Split Kerf Breaking out of grain

. METAL INCLUSIONS
staple
Metal inclusions mean metal inclusions such as nonferrous metals staples etc., in inner and external plywood layers.
В, S,     , S
Not allowable
,
Nonferrous metals staples
are allowable.

Not measured, determined as assortment making feature.
. MINERAL STREAKS, SAP STAINS
(BLUESTAIN, COLOR SAP SPOTS),
COLOR CHANGE AT WOOD STORAGE
Mineral streak is wood coloration in pale shades not masking its structure.
Bluestain is sap grey coloration with faint bluish tinge greenish cast.
Color sap spots are orange, yellow, pink (to light-purple) and brown sap color.

Not allowable
S Sel
Allowable on    %
of sheet area.
В, S
Allowable up to       %
of sheet area.
ВВ, ВВx
Allowable up to       %
of sheet area
(with false core).

Allowable up to       %
of sheet area
(with false core).

Allowable
without limitation.
Bluestain Color change at wood storage
Color sap spots Water spots

The defects shall be measured along the length and width of the area of their location, and shall be expressed
in percentage of the plywood sheet square.
В, B Sel
Not allowable
S, S Sel
Allowable the length
up to           mm,
width up to     mm,
pcs/m of sheet width.
ВВх
Allowable the length
up to           mm,
width up to     mm,
pcs/m of sheet width.
ВВ
Allowable the length
up to           mm,
width up to     mm,
pcs/m of sheet width.
Open splits is a split with width over    .    mm.
Open splits and open seam are measured by maximal length and width.
a. OPEN SPLITS,
OPEN SEAM ON SPLICED VENEER
mm
split up to     mm
mm
split up to     mm

WG
Allowable the length up to           mm,
width up to     mm,
pcs /m of sheet width.
patching splits with mastics
mm
open seam     mm
mm
split up to     mm
СР, WGE
Allowable the length up to           mm, width up to     mm,     pcs/m of sheet width.
Allowable the length up to           mm, width up to     mm, providing patching with mastic.

Open splits is a split with width over    .    mm.
Open splits and open seam are measured by maximal length and width.
b. OPEN SPLITS,
OPEN SEAM ON SPLICED VENEER
С
Allowable the length up to           mm,
width up to        mm,
without number limitations.

Allowable with the width
up to        mm,
without number limitations.
split up to        mm
mm
split up to        mm

Open splits is a split with width over    .    mm.
Open splits and open seam are measured by maximal length and width.
c. OPEN SPLITS,
OPEN SEAM ON SPLICED VENEER
. OVERLAPPING
Overlapping is a local thickening caused by overlapping of veneer sheets in the external layer of plywood.
Overlapping is measured on maximal length and width.
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable
the length
up to           mm,
width up to     mm,
pcs/m of sheet width.
СР, WGE
Allowable
the length
up to           mm,
width up to     mm,
pcs/m of sheet width.
WG
Allowable
the length
up to           mm,
width up to     mm,
pcs/m of sheet width.

Allowable
without limitation.
mm

. PARTIALLY INTERGROWN KNOTS
Partially intergrown knot is a knot with annual rings intergrown with surrounding wood along from
/    to    /    of knot section perimeter.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
В, S
Allowable
among black knots with
diameter up to     mm,
pcs/m   .
, S Sel
Allowable
among black knots with
diameter up to     mm,
pcs/m   .
ВВ, ВВx,
Allowable
among intergrown knots
with diameter up to        mm,
pcs/m   .
С
Allowable with
diameter up to        mm
and without number
limitations.
СC
Allowable with
diameter up to        mm
and without number
limitations.
mm
mm
mm
mm

. PIN KNOT
Pin knot is a sound intergrown knot with diameter not more than     mm.
Arithmetical average of minimal and maximal diameters is set as knot (hole) diameter.
Allowable for all sorts with no limitation in sizes and number.
mm

. PLUG REPAIR
В,     , ВВх
Not allowable
S, S Sel
pcs/m    is allowable
with color and grain
flow match.
BB
pcs/m    is allowable
with color and grain
flow match.
СР, WGE
Insertions with gap on one side
up to     mm (or on both sides    .    mm)
are allowable without number limitation
but not in color and orientation.
WG,
Insertions are allowable
without number limitation
but not in color and orientation.
clearance on one
side –     mm
clearance on
sides    .    mm Plug does not match
the fiber orientation
Plug does
not match the color

. POCKET (WITHOUT BARK)
Pocket is a cavity within wood or between annual rings filled in with tar or gum.
Both length and width shall be measured for pockets.
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable in size
of group stringers
(      x       mm)     pcs/m   .
,
Allowable

. RIPPLING (FOR SANDED PLYWOOD),
ROUGHNESS OF SAWN SURFACE
Rippling means surface irregularities in the form of regularly alternating elevations and arch shaped hollows.
Roughness means on the surface there are often occurring not completely separated wood fibers.
Roughness of sawn surface means on the surface there are often occurring small hollows, oriented along the fibers.
В, S, B Sel, S
Not allowable
,
Allowable
Rippling

The defects shall be measured along the length and width of the area of their location, and shall be expressed
in percentage of the plywood sheet square.
. SANDER SKIPS (NON-UNIFORM SANDING)
В,     , S Sel
Not allowable
S, ВВ, ВВx
Allowable
mm from the edge.

Allowable up to    %
of sheet area.
С
Allowable up to       %
of sheet area.

Allowable

The defects shall be measured along the length and width of the area of their location, and shall be expressed
in percentage of the plywood sheet square.
. SCRATCHES, SCARS, PIMPLES, RIDGES
Scratch is surface damage in the form of long narrow cavity caused by sharp object.
Ridge is a section in the form of narrow strip projecting above the surface.
Dent length, width and depth shall be measured.
В, S,     , S
Not allowable
СР, WGE
Allowable
height (depth) is up to    .    mm,
length is up to           mm,
width is up to        mm.
WG
Allowable width
is up to           mm.

Allowable
ridge
scratch
scratch, width        mm,
depth up to    .    mm

. SCUFFLENESS NON-SMOOTH
Scuffleness non-smooth is a surface cavity due to local wood removing during processing.
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable up to    %
of sheet area.

Allowable up to       %
of sheet area.

Allowable

The defects shall be measured along the length and width of the area of their location, and shall be expressed
in percentage of the plywood sheet square.
. SOUND COLOR CHANGES
(FALSE CORE)
False core is dark varicolored heart the border of that usually does not match with annual rings. It is separated from sapwood with dark
(less often light) border and solid as surrounding wood.
The false core shall be measured along the length and width of the area of their location, and shall be expressed
in percentage of the plywood sheet square.
В, S,     , S Sel
Not allowable
ВВ, ВВx
Allowable up to       %
of sheet area.
, С
Allowable up to       %
of sheet area.

Allowable
without limitation.

. SOUND COLOR CHANGES
(MOTTLES)
Mottles mean hardwood sap color in the form of spots and strips without reducing wood hardness occurring in growing trees
and similar in color to core color.
Mottles length, width and number shall be measured.
B Sel
The light one
is allowable the length
up to           mm, width
up to     mm,
pcs/m   .
S Sel
The light one
is allowable the length
up to           mm, width
up to     mm,
pcs/m   .
B
The light one
is allowable the length
up to           mm, width
up to     mm,
pcs/m   .
S
The light one
is allowable the length
up to           mm, width
up to     mm,
pcs/m   .
ВВ, ВВx
Allowable the length
up to           mm,
width up to        mm,
pcs/m   .
,
Allowable
without limitation.
mm
width is up to     mm
mm
width is up to     mm
mm
width is up to        mm

. SOUND COLOR CHANGES
(STRINGERS, TRACES OF STRINGERS)
Stringers mean mottling in the form of thin yellowish and brown strips of spongy tissue located along border
of annual rings.
Traces of stringers are bleached or darkish strips on veneer sheet area due to stringers under it at a depth of not more
than     mm.
Light stringer Traces of stringers Dark stringer
Stringers length, width and number shall be measured.

B Sel
The light ones
are allowable the length
up to           mm, width
up to     mm,
pcs/m   .
S Sel
The light ones
are allowable the length
up to           mm, width
up to     mm,
pcs/m   .
B
The light ones
are allowable the length
up to           mm, width
up to     mm,
pcs/m   .
S
The light ones
are allowable the length
up to           mm, width
up to     mm,
pcs/m   .
ВВ, ВВx
The light and dark
ones are allowable
the length up to
mm, width
up to        mm,        pcs/m   .
,
Allowable
without limitation.
. SOUND COLOR CHANGES
(VEINS GROUPS)
Veins groups are stringers close spacing in the form of overlap strips.
B Sel
Not allowable
В,
The light ones       х       mm
are allowable,
per m   .
ВВ, ВВx
The light ones       х       mm
are allowable,
per m   .
,
Allowable
without limitations.
Veins length, width and number shall be measured.

. SPLIT REPAIR WITH PATCHES OR PLUG REPAIRS
Patch or plug repair if agreed with customer.
ВВ
Splits over     mm
shall be filled
with veneer sheet
insertions with glue.

Splits over     mm
shall be filled
with veneer sheet
insertions with glue.

Allowable

Not allowable

. WARPAGE
Warpage is a curvature of plywood sheet flatness.

It is not considered in plywood with width up to    .    mm;
it is allowable with width over    .    mm not more than        mm
by     m of sheet diagonal length.
It is not considered in plywood with width up to    .    mm;
it is allowable with width over    .    mm not more than        mm
by     m of sheet diagonal length.
It is measured by putting ruler on the cross of a sheet placed on the flat surface and measuring maximal bouge.
bouge

. WOOD DEFECTS
(OPEN INBARK)
Open inbark is healing streak with radial gap cavity generally filled in with bark waste and dead tissues.
It is allowable within the total number
in accordance with the norms for black knots.

Bark pocket length shall be measured.
. WOOD STRUCTURE DEFECTS
(GROWN TOGETHER LIGHT AND DARK BARK POCKET)
Bark pocket is healing streak or scab with radial gap cavity generally filled in with bark waste and dead tissues.
Grown together bark pocket is a trace of closed bark pocket in the form of elongated section (seam) of wave growth timber
on veneer sheet area.
Light bark pocket is bark pocket with wood similar in color to surrounding wood without bark inclusions.
Dark bark pocket is bark pocket with wood much darker than surrounding wood or with bark inclusions.
Bark pocket length shall be measured.
Light bark pocket Dark bark pocket
Only light bark pocket is allowable,
dark bark pocket is allowable in the size
and in the number among black knots.

Light bark pocket is allowable,
dark bark pocket is allowable in the size
of intergrown knots.

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