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Do you need to dry discs?

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Forum topic by Noobtowood posted 10-20-2015 07:46 PM 620 views 1 time favorited 5 replies Add to Favorites Watch
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Noobtowood

2 posts in 415 days


10-20-2015 07:46 PM

Very new to wood working, my wife wants me to cut up some nice black walnut logs I have in the back into 1” thick discs so she can lacquer the top and hang them. Do I need to dry the discs in a kiln first even if the back side will be uncoated and allow to dry overtime?


5 replies so far

View mahdee's profile

mahdee

3553 posts in 1233 days


#1 posted 10-20-2015 07:50 PM

Regardless of how you dry them, they will have cracks and checks. If you coat only one side, it will more likely cup as well.

-- earthartandfoods.com

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HarveyM

92 posts in 1488 days


#2 posted 10-20-2015 07:59 PM

I’m not an expert, but I think treating the wood with Polyethylene glycol (PEG) will help. Lee Valley carries it (and instructions on how to use it).

-- Just a Duffer

View leafherder's profile

leafherder

897 posts in 1417 days


#3 posted 10-20-2015 10:44 PM

The thinner you slice them, the less likely they are to develop cracks, slicing on an angle also helps. I sliced a black walnut log into half inch or less thick slices and out of 30 pieces only about 12 developed cracks. What will the final project be, does she want rounds or ovals? Standard slices yield reasonably round shapes, slicing on an angle gives ovals, the sharper the angle the longer the oval and the less likely to crack. At 1 inch thick I would let them air dry for about 6 months, thinner slices take less time, thicker slices take more time. Does she want the bark left on? That can be a whole new problem, it might start to fall off as the pieces dry, and when it stays on it can suck up the finish like a sponge, so the wood and bark end up with different levels of shine.
Good luck and let us know how it goes.

-- Leafherder

View rick1955's profile

rick1955

258 posts in 896 days


#4 posted 10-21-2015 01:07 AM

http://www.preservation-solutions.com/wood-treatment-products/wood-treatment-product-guides/stabilizing-a-cross-cut-section-of-wood-with-pentacryl/
PEG is old school. Pentacryl really works and will take a finish unlike PEG which is wax based. I’ve used it and had 100% results.

-- Working smarter with less tools is a true crafts person...

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Noobtowood

2 posts in 415 days


#5 posted 10-21-2015 02:03 PM

Thanks guys i like those options. Not positive if she wants rounds or ovals both might be a good option she wants to stain them and hang them around our bar. I will look into the PEG also.

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