Is there a way to find out if some stained glass is compatible with fusing?
Yes,
there is a way to test for compatibility. This strip test is the one
I recommend. It is simple, repeatable and provides a reference for
future use if labelled and stored carefully.
Determining the Coefficient of Expansion (CoE) is a testing laboratory process, not something we can do at studio level. But compatibility of several glasses can be easily established by this testing process.
Some indicators:
Stained glass is more likely to be compatible with Oceanside or Wissmach than Bullseye.
Transparent and streaky glasses are more likely to work in Kilnforming than wispy or opalescent, which tend to devitrify easily and have more compatibility problems.
It is possible to find colours from one manufacturer that are compatible with each other but with none of the fusing compatible glasses, but it takes a lot of testing.
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