Fuse It Compatibility Test Card
When different COEs look nearly identical, guessing can cost you a full firing. The Fuse It Compatibility Test Card makes it easy to check compatibility so you can fuse with confidence and safely use more of your glass.
Why youll love it
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Eliminates guesswork when glass looks too similar to tell apart visually
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Helps confirm compatibility when working with mixed COEs
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Simple, accurate method using polarized film
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Specialized materials included we sourced whats hard to find
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More confidence, less wastereduce avoidable stress issues and lost time
How it works
A straightforward polarized film test helps reveal compatibility differences that arent visible to the naked eyeso you can sort and use your glass more safely.
Perfect for: glass artists who mix COEs, work with scrap, inherited glass, unlabeled pieces, or visually similar colors/sheets.
