Last Updated: Jul 19, 2016     Views: 31

Check out Mickelsen's article on lampworking using soft glass. He includes information on COE and provides a list of suppliers at the end of the article.

Also see the website's information on COE:

According to the website, which lists COEs for many different glass makers, there are one or two with lower measured COEs than Bullseye:

If you need more technical/background information than this, I'm attaching a bibliography of materials on COEs.

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