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Does shellac shrink?
http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=54166
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Author:  meddlingfool [ Sun May 23, 2021 4:43 pm ]
Post subject:  Does shellac shrink?

Inquiring minds want to know, and I do too.

Author:  powdrell [ Sun May 23, 2021 4:58 pm ]
Post subject:  Re: Does shellac shrink?

Yes...over a period of a few weeks......at least with french polish technique.....let 'em out too early and it will be back in the shop for 'touch-up'.....

Author:  Alan Carruth [ Sun May 23, 2021 5:12 pm ]
Post subject:  Re: Does shellac shrink?

Alcohol is less volatile than lacquer thinner, so shellac actually takes longer to shrink back than lacquer does at a given thickness. Many lacquer finishers allow for as much as a month after spraying the last coat for shrinkage, but since shellac usually goes on thinner (especially with a French polish finish) it doesn't usually take that long. Still, don't try to push it.

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