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General Workshop Discussion
Wood Turning - Lathes
The Warping Cherry Bowl
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<blockquote data-quote="Kerrowman" data-source="post: 1502221" data-attributes="member: 36493"><p>I have not worked with Black Cherry before but after my experience I will be cautious of doing so in the future.</p><p></p><p>As a forthcoming present for a relative I ‘first turned’ a small bowl on a stem using some green Cherry wood and then over two days dried it down to about 10% using the microwave method.</p><p></p><p>I finished turning it and then used three coats of Danish Oil as a finish, with about 6 hours between each coat, and then left if for 3 days to cure before buffing.</p><p></p><p>The result was a nice satin sheen on an interesting grain pattern, as in the pic.</p><p></p><p>I put the bowl aside ready to be boxed and then picked it up today (about two days later) and found to my horror that it had warped considerably (see next pic).</p><p></p><p>I know that Black Cherry is prone to cracking, and I had to deal with a few cracks after drying, but I was most surprised to see this warping in a bowl that was effectively finished. This is the first time I have experienced warping of any wood after completing a project.</p><p></p><p>So I have had to re-turn the bowl significantly to remove all the distortions and have applied cellulose sealer instead as a finish with some cut and paste and a buff. So the bowl is ‘rescued’ but it’s a very different entity with a different finish - see pic.</p><p></p><p>This raises a few questions:</p><p></p><p>Does Danish Oil, once cured, acts as a seal to the wood, like sanding sealer, to prevent moisture changes and warping?</p><p></p><p>Is this behaviour of Cherry typical and how might such warping after finishing be avoided?</p><p></p><p>Thanks for any thoughts,</p><p></p><p>Julian</p><p></p><p>[ATTACH]116082[/ATTACH][ATTACH]116083[/ATTACH][ATTACH]116084[/ATTACH][ATTACH]116085[/ATTACH]</p></blockquote><p></p>
[QUOTE="Kerrowman, post: 1502221, member: 36493"] I have not worked with Black Cherry before but after my experience I will be cautious of doing so in the future. As a forthcoming present for a relative I ‘first turned’ a small bowl on a stem using some green Cherry wood and then over two days dried it down to about 10% using the microwave method. I finished turning it and then used three coats of Danish Oil as a finish, with about 6 hours between each coat, and then left if for 3 days to cure before buffing. The result was a nice satin sheen on an interesting grain pattern, as in the pic. I put the bowl aside ready to be boxed and then picked it up today (about two days later) and found to my horror that it had warped considerably (see next pic). I know that Black Cherry is prone to cracking, and I had to deal with a few cracks after drying, but I was most surprised to see this warping in a bowl that was effectively finished. This is the first time I have experienced warping of any wood after completing a project. So I have had to re-turn the bowl significantly to remove all the distortions and have applied cellulose sealer instead as a finish with some cut and paste and a buff. So the bowl is ‘rescued’ but it’s a very different entity with a different finish - see pic. This raises a few questions: Does Danish Oil, once cured, acts as a seal to the wood, like sanding sealer, to prevent moisture changes and warping? Is this behaviour of Cherry typical and how might such warping after finishing be avoided? Thanks for any thoughts, Julian [ATTACH alt="0E35042B-E7CD-4563-8460-8BB44953C27E.jpeg"]116082[/ATTACH][ATTACH alt="B128B531-1B4A-45A9-9FC2-5E7D93F04051.jpeg"]116083[/ATTACH][ATTACH alt="068BCEB8-9740-41CA-B8A4-F0A16D0322F6.jpeg"]116084[/ATTACH][ATTACH]116085[/ATTACH] [/QUOTE]
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General Workshop Discussion
Wood Turning - Lathes
The Warping Cherry Bowl
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