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Reply by Aj2

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Posted on Necessary to veneer both sides of a 1-1/2” thick laminated plywood substrate?

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Aj2

3414 posts in 2680 days


#1 posted 10-12-2018 07:37 PM

When the plywood was made they veneered both sides correct.? The smart guys know without doing this the panel would warp straight out of the press.
Now the op wants to upset this balance so it needs to be equally treated on both sides.

I will now attempt a scientific guess to what happens when we add water based glue to One face of a sheet of plywood

Glue is absorbed into sheet, the cells puff up into their natural shape everything is happy. Panel is removed from clamps air is now in contact with surface. And panel starts shrinking as water starts leaving unhappy cells. A bazillion cells all shrinking a tiny bit adds up and pulls the whole substrate into a unknown shape that’s not anywhere near flat.
I rest my case :))

-- Aj


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