I am veneering using birdseye maple over baltic birch ply using yellow glue and a vacuum press. My test piece came out all wrinkled. What am I doing wrong
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Replies
Hi,
I'm not much of a veneer guy, but it sounds like your problem is water.
Think about it: you're using a water based glue and only one side of the veneer is getting wet. So it's wrinkling. I'd first try sponging down the face side of the veneer and then rolling on your glue. Try not to
super saturate the veneer with glue either.
You could also use either a urea-formaldehyde or an epoxy for gluing, one glue using less water and the other no water at all. Let me know how you fare. Gary
Thanks...I have gotten a lot of good advise and will try them all.
P.S. Do you have any family in Pittsburgh? I have some Rogowski family
Not that I'm aware of in Pittsburgh. Good luck with the veneering. Gary
I have some veneering experience and I think the problem is technique, coupled with the water based glue. The glue should be applied to the core, not the veneer. This minimizes the effect of water absorbed by the veneer. Once the glue is applied, you place the veneer onto the glue covered surface, and then put the separation layer and clamping caul over the veneer. The veneer will expand as it absorbs water from the glue, but the clamping caul will help hold it flat until you get it into the press. This process is done on both sides. I start with the backing veneer and then apply the face veneer last. Try writing out the sequence of steps and do a dry run. It really helps.As Gary said, there are other adhesives designed for use with veneers that will also reduce this problem. Unibond 800 is a urea formaldehyde. Joe Woodworker sells a cold press glue that also works well.Good luck, Tom.
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