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My bubble bowl shattered in the kiln: bad glass or wrong temperature?
I'm torn between blaming the supplier's batch and my own heat settings, what do you think?
3 comments
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andrew_craig7mo ago
What ramp rate did you use for the heating cycle, and how thick was the glass you were working with?
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willowp757mo ago
My last bubble bowl survived three firings before I even checked my kiln's calibration. Glass batches from suppliers are pretty consistent these days, so a whole bad batch is rare. I'd put money on the temp ramping up or down too fast for that specific thickness. Try a small test piece with a way slower heating cycle next time, it almost always fixes it for me.
2
christopher9527mo ago
Actually had the same thing happen with my last project. Ditching the fast cycle for a basic slow ramp fixed a huge bubble mess for me. Guess sometimes the kiln just needs to chill out.
3