Thread: Can you use 104 enamels to torch fire on copper?
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Old 2012-01-04, 8:16pm
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AmorphousDesigns AmorphousDesigns is offline
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from this site:

http://www.porcelainenamel.com/pei502.htm

enamal COE's range from 80 to 140 depending on composition. Enamel is stronger in compression, so if there is a COE mismatch, it's better if the enamel has a lower COE than the metal. Maybe that's why some people have had success with 104 COE enamel on 170 COE copper?
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