What is cross banding, and why is it used? Is it always necessary to cross grain when applying sheet veneer to hardwood plywood? My plywood all comes with grain running lengthwise, which is the same way I want the veneer grain to run. Is that a problem?
The grain in plywood runs in alternating directions and always in an odd number of plys so the sheet has stability from movement and shrinkage. If you are veneering over plywood and then using any kind of glossy finish, the grain from the plywood will telegraph (show) through the veneer you are applying. Plywood is not the best substrate to veneer over. If you have to, the veneer should be perpendicular to the substrate so the wood movement is not running in the same direction.
Locke Wilde, forum technical advisor