Frequently Asked Questions


What is the difference between COE96 and COE90 precut glass shapes and designs?
A COE is shorthand for Coefficient of Expansion, and it refers to the rate at which glass expands and contracts when heated or cooled. COE 90 and COE 96 glass are similar in many ways, and can be used for fusing and kiln-forming with excellent results. It is important to remember, however, to avoid mixing glasses with different coefficients – while COE 90 and COE 96 glasses are all compatibility tested, you can only fuse like with like. A COE 90 piece of glass will not successfully fuse with a COE 96 piece, and you’re more likely to waste time and effort than you are to end up with a usable end product.

Jubilee Creative Precut Glass Shapes and Designs