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Does shellac shrink?

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meddlingfool

Post subject: Does shellac shrink?

Posted: Sun May 23, 2021 4:43 pm

Brazilian Rosewood

Joined: Wed Feb 20, 2008 7:15 pm
Posts: 7378
First name: Ed
Last Name: Bond
City: Vancouver
Country: Canada
Focus: Build
Status: Professional

Inquiring minds want to know, and I do too.

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powdrell

Post subject: Re: Does shellac shrink?

Posted: Sun May 23, 2021 4:58 pm

Mahogany

Joined: Mon Dec 22, 2008 7:22 pm
Posts: 88
First name: doug
Last Name: powdrell
City: hilo
State: big island
Focus: Build
Status: Amateur

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'.....

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Alan Carruth

Post subject: Re: Does shellac shrink?

Posted: Sun May 23, 2021 5:12 pm

Brazilian Rosewood

Joined: Sat Jan 15, 2005 12:50 pm
Posts: 3927
Location: United States

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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