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Question
I made a small clay sculpture, smoothed it with a sponge and let it dry. then I painted 2 thin coats of underglaze on it. After it was fired properly, the undergaze came out cracked and peeling....any idea what went wrong?
Hi Linda, I can think of 2 things to check, and test's will confirm. There was contamination of sorts in the sponging process or there is a problem with the underglaze.
Do 2 tests
1. sponge a test piece and apply a different u/glaze and fire.
2. Apply the offending U/glaze to a dry unsponged test piece and fire.
The testing will be the quickest way to analyze your problem
Related Articles
Sam Kelly
Expertise
questions with regard to all types of clay, glaze problems and glaze making and application. gas and electric kiln firing
Experience
I am a full time studio potter, also technical assistant in the ceramics department of our local college.
Education/Credentials
I completed a three year ceramics course with 6 distinctions and 5 credits. 2 years as a proffesional potter in on of Australia's largest potteries. Working full time as a studio potter.
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