Maybe your kiln is too cool. I usually have mine around 1150 to strike most boro glass. Usually 30 minutes or so in there will do it.
I usually garage around 1050. Then when I'm done, I ramp up to 1150... hold for 30 minutes... then start the annealing program.
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Cori C-R
PS - This is what part of the alphabet would look like if Q and R were eliminated.
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