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I had this happen on a glaze firing,,,, the kiln sitter cone broke. I called Orton and they said to check each cone by holding with fingers and pull... not twist. The cone should not break. I had about 15 in a 50 piece box break. Not sure why... defect in cones or rough handling in shipping??? But with the test pull I feel more confident it won't happen again. I had some interesting glaze melts which didn't quite correct in the refiring and never to be replicated.

Well isn't 112 clay used in many a studio? And aren't all those specks (112 BROWN CLAY (Cone 4-6)Plastic clay for wheel and modeling. The addition of granular manganese gives a speckled surface. ) Manganese? Is this dangerous. I just started using 112 and there are a lot of specks and I fire in my basement with a window fan. Am I being stupid?? I

I too was using the fry pan method with tea candles. I had a lot of wax on the bottoms. Then I felt I had to scrap it because the wax fumes were bad when firing. I just bought some Forbes wax resist....goes on so easy with a small foam brush. And you don't get that little " burp mark" on glaze edge.