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Old 12-06-2019, 04:12 PM
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Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
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Likely caused by antimony in the glass which doesn't exactly Brown up, but it does discolor. One of the things about torching is to avoid having the valence switch in the antimony from penta to mono valent as it suddenly gets a lot hotter. I think Shawn could be more expansive about how his fix works, and why.
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