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Old 2022-03-05, 1:46pm
ESC ESC is offline
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Join Date: Feb 02, 2010
Posts: 3,371
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Hi! You absolutely cannot use boro with any other glass besides boro. Same goes for Bullseye. The 104 glasses are compatible sometimes, but not always. Explore the tips and techniques page, as there's a ton of info in there on mixing COEs (or not).
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Soft glass on a Minor/concentrator since 1996
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