Crack on slump... Help?
Posted: Tue May 25, 2021 6:09 pm
I had a dish crack in the slump (not break). I've used the same firing schedule in the past with no problem (though I usually do +5 deg more). I've been through my log and can't see what's different to explain it. This was a custom order dish and I really want to get it right this time, hopefully sooner rather than later!
Details:
Bullseye 2 layers, clear transparent on top.
Dish is 5 in.
Crack is curved, doesn't quite go through. One end of the curve goes to the edge of the glass, but not the other.
Firing schedules:
Full fuse:
400. 1100. 25m
400. 1350. 15m
FULL 960. 60m
150. 700. 0
Tack (dots)
400. 1300. 5m
Full. 960. 60m
150. 700. 0
Slump
300. 1245. 15m. (I usually do 1250, but have used both in the past)
Full. 960. 60m
100. 700. 0
Advice?
(After full fuse, the surface was a little bumpy --like some of the bubbles didn't quite make their way out, but if that was a problem, would the dish have made it as far as the slump?)
Details:
Bullseye 2 layers, clear transparent on top.
Dish is 5 in.
Crack is curved, doesn't quite go through. One end of the curve goes to the edge of the glass, but not the other.
Firing schedules:
Full fuse:
400. 1100. 25m
400. 1350. 15m
FULL 960. 60m
150. 700. 0
Tack (dots)
400. 1300. 5m
Full. 960. 60m
150. 700. 0
Slump
300. 1245. 15m. (I usually do 1250, but have used both in the past)
Full. 960. 60m
100. 700. 0
Advice?
(After full fuse, the surface was a little bumpy --like some of the bubbles didn't quite make their way out, but if that was a problem, would the dish have made it as far as the slump?)