I have loads of different grades of Ply ... anybody know of a good on-line
source that helps identify different standards for ply.

For example I have 1/2" ply .. in shuttering grade, WBP and Marine ....
understand the difference OK, but I also have some 1/2" ply that is made
from more individual plys than 'the standards'

It is very good quality, very dense and seems to be generally referred to as
Birch ply ... but I assumed Birch was referring to finish on one face only.
?


Any Ply experts want to enlighten ?

Rick