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Old 2022-03-20, 10:30am
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echeveria echeveria is offline
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Join Date: Aug 31, 2006
Location: Knoxville, TN
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1. What kind of glass are you melting? If borosilicate, you do need at least shade 3.
2. That sounds like carbon buildup, and can be caused by a reducing flame chemistry. Are you using tanked or concentrator oxygen? GTT torches will soot up pretty quickly if your flame is not typically neutral or oxygenated. Cleaning it regularly is good; proper flame chemistry is also good. I had a wire that came with my torch that I put on a magnet on my hood and cleaned ports after every session, and as needed if I was doing a lot of reducing.
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