Enrico Konig
Posts: 74
Joined: 2006-01-06
Location: Vancouver, BC
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I often use 2-ply, usually to ensure show veneer grain is going 90 degrees to layer beneath it, i.e. when substrate grain is going same direction as face veneer. Also with unstable cuts, such as burls. Or when using mdf, as it seems to me the bond of wood to wood (face veneer to backer veneer) is much sounder than veneer to mdf. But I've had issues a few times with mdf being delaminated by the wood movement of veneer, so generally I now avoid mdf altogether (even if those problems were because of faulty mdf, i.e. not enough resin in the mdf). Actual wood glued to actual wood is always going to be a better bond, imo.
And having used 2-ply extensively now, 2-ply really seems like it is better quality than single ply, especially with unstable cuts of wood like birdseye maple or burls, for example.
I've always glued the 2-ply first before applying to substrate. Partly habit, but also because I think it's easier to ensure a perfect bond between the 2 layers of veneer before applying to substrate. But I can see advantages to doing it the other way too.
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