Most regular Birch plywood is as you said 7 ply, but generally the interior plys are not birch but some other soft wood with just the outside layer being birch. As I recall Marine grade plywood is just manufactured with a mairne grade glue so that it won't delaminate when it gets wet. I am also thinking that it is 9 ply with all layers being birch. It has been many years since I have used any marine grade plywood so please don't hold me to this. Other than the number of layers in the baltic birch it is also birch all they through. and I believe that the Birch that comes from the northern lattitudes where this comes from is supposed to be a denser wood and there for harder. When making drawers I prefer to use this type of plywood also. Just remember that 3/4, 1/2 etc thick plywood is no longer 3/4, 1/2 or whatever but actually 1/32 under size.. It's kind of a pain when building cabinets that you want to be an exact size but you get used to it.
Hope this info helps. |
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