1-LAYER – SPRUCE

Class A:
As a rule perfect front and furniture quality. Joint-tight surface, healthy firmly intergrown small knots, individual small resin pockets, virtually free of compression wood and core pith, even colour, individual natural knot plugs and repaired resin pockets permissible, virtually free of sapwood (in the case of pine), reverse side closed.

Class B:
Joint-tight surface, plain to slightly coarsely ringed wood. Healthy, firmly intergrown knots, individual black point knots permitted, black-edged knots (in the case of pine) permissible, small proportions of pith possible, slight colour deviations permissible, shallow cracks on the panel edges permissible. Natural knot plugs, resin pockets and resin pocket repairs permissible, reverse side closed.

Class BK:
Is a furniture-body quality. Surface closed on one side. Strong and pronounced wood structure, largish knots, resin pockets, compression wood, pith and discolorations as well as shallow surface cracks permissible.