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How thick a layer of powder?

Posted: Fri Sep 12, 2025 10:21 pm
by CH Glass
I used to know this... I want to fuse a 3mm layer of frit powder to a sheet of 3mm clear glass. How thick should the powder layer be, prior to firing? I'll fire to 1375 and hold for 15 minutes. In my kiln, that will give me a smooth shiny finish. Thanks!

Re: How thick a layer of powder?

Posted: Sat Sep 13, 2025 2:41 pm
by Brad Walker
The answer is going to depend on the color, but typically powder shrinks up to 1/2.

Why do you want the powder so thick? Can it work with a layer of thin (2mm) and a little less powder?