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Old 08-25-2020, 05:50 PM
Steven O'Day Steven O'Day is offline
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Join Date: Jun 2002
Location: portland oregon
Posts: 336
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If it is smooth on both sides it probably is fusing glass and would work. If each side looks different with striations, small seeds or texture it probably is window glass and will probably devitrify on fusing.

Like Pete said, testing is your friend.

I made an 2" sq pattern bar out of Spectrum 96 white without any problem, no devit but this was not in contact with plaster.
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