Russia Plywood Grades

Russia Plywood Grades

GRADE I

– practically free from defects; partially intergrown-, dead- and loose knots, knot holes, worm holes with diameteres not exceeding 6 mm and totaling 3 pcs. per 1 m2; also are allowed not more than 5 intergrown sound knots with a diameter of 15 mm per 1 m2, and some minor brown vein lines. Varnished or not varnished. Used for the manufacture of laminated plywood

GRADE II

– are allowed partially intergrown-, dead- and loose knots, knot holes, worm holes with diameteres not exceeding 6 mm and totaling 6 pcs. per 1 m2; also are allowed not more than 10 intergrown sound knots with a diameter of 25 mm per 1 m2, patching of the sheet surface is permitted. Knots and open defects are sealed with veneer inserts. The surface may be covered by various finishing materials and paints.

GRADE III

– are allowed partially intergrown-, dead- and loose knots, knot holes, worm holes with diameteres not exceeding 6 mm and totaling 10 pcs. per 1 m2 of the sheet surface; intergrown sound knots are permitted in unlimited numbers. Intended for the manufacture of panel structures hidden from view, and for manufacturing various special-purpose containers and packaging

GRADE IV

– any manufacturing defects are allowed. Partially intergrown-, dead- and loose knots, knot holes, worm holes with diameteres not exceeding 40 mm are permissible in unlimited numbers, only fair glueing of veneer sheets is guaranteed. Used for the manufacture of solid transport containers and packaging

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