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[1]Thanks for responding so quickly, Unfortunately my job gets in the way of my glass. The initial piece was a single layer of spectrum 96 and bits of broken glass and frit on the edges, so there were thick and thin areas. I will double cool next time The edges were sharp on the three pieces. [2] th...

Thanks so much for the photo, glad to hear I am not the only one making these mistakes. Although I am sorry for your disaster. It looks like it would have been beautiful. Thanks for sharing.

I have programed other schedules into my controller. I just have never had any problems with the preprogramed ones. I will have to experiment more, thanks for your advice.

Thanks Tom, for your advice I have never fired anything that many times, but I liked the plate and thought I would give it a try. Could it also have been the fact that I full fused it on a mold?

I was fusing on the slumping mold. It was already slumped, so I just put the frit in the crack and refused on the mold. Didn't realize that it would make a difference.

I recently fired an 8"x12" single layer of spectrum 96 glass using the tack fuse preset on my kiln. I have used this setting many times without a problem. When I removed it from the kiln it had broken into 3 pieces. I then placed the three pieces onto a 96 clear sheet, filled in the cracks...