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Old 2013-11-20, 8:45pm
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Hayley Hayley is offline
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Join Date: Oct 05, 2006
Location: San Francisco
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Awesome information, Brad! Thank you so much for taking the time to share with us your expertise in glass making!

Quote:
Originally Posted by glassmaker View Post
Without getting into a long explanation of glass chemistry, the short version is that the COE of Cd-Se glasses can change when they are worked for a long time. The more trips up and down in temperature, or the longer they are held at a high temperature, the more likely their compatibility will change.
Loren warned us about using Cd-Se glasses for our butterfly murrine but never gave this thorough an explanation. Two of the murrine made with Cd-Se glass cracked on the last, fifth, day … exactly what you described regarding multiple trips up and down in temperature! Thank you again!
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