The appearance grade of plywood includes BB/BB, BB/CC,C/C,C/D,D/E,E/F,BB/WG,BB/CP for sure.
Among them, the grade of BB/BB, BB/CC mainly goes for the red the appearance of the mixed veneer grade; C/C, C/D, E/F, mainly goes for the appearance level of birch or poplar plywood by domestic export enterprises ranked ; BB/WG, is one of the standard in Finnish birch plywood level; BB/CP (including BB/BB, C/C), is one of the Russian standard for birch plywood appearance level; It is important to be noted that the domestic level of C/C not means the Russia plywood in the standard of C/C ,they are not the same . Domestic C/C level is often equivalent to the BB/BB Russian standard
The plywood appearance grade in America ranks : plywood appearance behind each panel face and trim depends on the quality of veneer surface and material.
Here the second letter means the rear extents of the surface, stands for the surface quality of the first letters selected faces surface trim edge (best) [5] the letter X
indicates that the quality of the panel manufacturing and small piece of wood, not used as center, no external commonly think A - D and e. (soft wood) plywood is only good
for the building, not for hardwood plywood such as oak and maple tree.