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when can i cheat balancing a veneered panel?11/21
we're making some small shelves - 24" x 10" - out of santos mahogany. my plan is to use solid 1.5" thick stock, mitered for the perimeter on three sides with plywood and veneer for the field. we're going to rabbit the solid stock so the plywood sits near flush, sand it flush with the solid banding, and apply the veneer on top of everything.
do i need to balance the plywood (12mm, 7 or 9 ply Russian birch) with a veneer, or does my smallish size and construction style not make this necessary?
if i should veneer it, do you think i would be okay to veneer one side and wait a day or two to veneer the top side? without altering my construction plan, it'll be at least next day before i can add the top/showing veneer to complete the balanced panel.
I'd say you are going to have trouble even before doing anything on the faces. If I understand it correctly, you are going to glue plywood on the end grain of a 10" wide board? Unless it's quarter sawn, something is going to crack. Seems like you are ignoring the movement of the solid wood.
maybe i didn't describe it very well.
think a 23" x 9" piece of plywood with three sides of 1" wide solid wood edging. i'm going to cut a rabbit at the top and bottom of the solid to receive a top and bottom piece plywood. i'm going to sand this all flush and then veneer over the plywood and solid to the top and bottom sides are seamless.
i've done this before (without using a backing veneer) over 1/2" mdf for some showroom pieces, but never over plywood (and never for a paying gig).
I would use Santos mahogany ply and edge band with thin solid, maybe 2-3mm. Not sure what the rabbet would be for.
I have idea, but I suggest you go ahead and do it and report back here so we can all benefit form your success or failure.
This is why woodworkers are so indecisive....no security anywhere.
I still don't know, that is big enough where I would wonder myself.
So you will have a 7-9 ply ply with an added veneer and glue on one side. If it is to work, use a glue with little to no water, keep everything, before during and after at stable temp and humidity. If vacuum bagging, dead stack upon removal. After a day or two stack with stickers. Finish the same top and bottom, and then cross fingers. It needs to ship and store and go into service all at a stable humidity. Then report back here.
Remember what Dr Gene says - "wood moves in response to changes in moisture content".
andy - santos ply is only available in full hack quantities. i only need approximately 40 sq total and have already ordered veneer.
david - will do. i'm maybe running out of time to veneer both sides anyways. my showroom pieces look fine but i used 1/2" mdf instead of ply. ply gives it more stiffness and that's why i incorporated it. i'm not going to be able to finish both sides as the design won't allow for it, so maybe i should only cheat one thing at a time and veneer both sides.
To add to David's response, I wouldn't rely on just stacking in a controlled environ. I would clamp my stack of veneered panels to a known flat.