COE stands for Coefficient of Expansion.
Why is it important to know about COE?
There are a multitude of glass manufacturers, and many different ways of making glass. In Glass Fusing, since you want to put different pieces of glass together in your projects, you will need to be sure that they are compatible.
Not every piece of glass expands and contracts at the same temperature. This change in the density is known as the Coefficient of Expansion (COE).
All pieces you fuse together need to have the same coefficient of expansion (COE).
Bullseye Glass is 90 COE
Spectrum Glass is 96 COE
You can NOT mix glass of different COE in the same project
At DichroicAndMore.com, we carry both 90COE and 96COE glass and Dichroic Glass
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