In normal plywood, the ATSM or BB standards only apply to the face veneers used to finish the product. The core can be of whatever quality is convenient for the manufacturer. True Baltic Birch is ...
Baltic Birch and Appleply are top-notch veneer core plywoods, which you’ll only find at a lumber yard. Their 1/16-in.-thick core options veneer offer better stability than typical plywood with 1 ...