Milled Walnut Cupping. :-(

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Forum topic by curi0usJack posted 11-05-2010 08:59 PM 1031 views 0 times favorited 1 reply Add to Favorites Watch
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21 posts in 2785 days

11-05-2010 08:59 PM

I glued up a couple of black walnut panels a couple months ago for a blanket chest. Time got away from me and now that I’m coming back to the project, I noticed that one of my panels (36”L x 19”W x 1”T) is slightly cupped (clearly I stored it wrong – I didn’t think this much time would pass <sigh>). Is there any way I can flatten this piece that doesn’t involve cutting/planing/regluing it – and consequently my other panels so they match? Anyone tried the moisturizing trick?

Here’s hoping…

Thanks for your help.

1 reply so far

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1028 posts in 3091 days

#1 posted 11-06-2010 12:07 AM

assuming that the panels were flat before you stored them, they have most likely been exposed to more humidity on the side that is now convex. try storing the panels for a few days in a position where they are propped up and exposed to air equally on both sides.

If that doesn’t help, trying wiping down the concave side with water and let it sit for a couple days with that side exposed to air. you might even put the panel on some saw horses with the wet concave side down, and put a cinder block on top. don’t go too crazy with the weight, however. You don’t want it springing back after it is attached to your project.

-- PaulMayer,

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