Try this schedule. I’m

#12527
moehring
Participant

Try this schedule. I’m assuming you’re using COE90 glass. It looks like your second segment is too fast.  New anneal temp is 900.  Should work for 1/4″ to 3/8″ thick piece.

200/hr  900deg   30min

200/hr   1225deg  5min

9999     900deg   60min

100/hr    700deg   0min

200/hr    100deg   0min

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