SVEZA Interior and Exterior Plywood grades Defects Part 3 :Black knots, loose knots, knot holes (no bark inclusions)

SVEZA Interior and Exterior Plywood grades Defects Part 3 :Black knots, loose knots, knot holes (no bark inclusions)

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Black knot’s annual rings are not intergrown with the surrounding wood or are intergrown with it through up to 1/4 of the knot’s cross-section perimeter.

Black knots, loose knots, knot holes (no bark inclusions)
Black knots, loose knots, knot holes (no bark inclusions)

Loose knot is one not intergrown with the surrounding wood, but holding tight.

The diameter of the knot (hole) is the average of the minimum and the maximum diameters.
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