Quote:
Originally Posted by PracticalMagicGlass
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? |
I talked to a technician at Thompson and the COE for the enamels used on metal is 86-120 depending on the color. I think it is more that you shouldn't use enamels for metal on glass than the other way around.
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Julie
-Outwest Art Glass
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