I have some 96 COE frit which I want to cast into a shallow mould, the cast shape being 190mm wide, 240mm long and about 6mm thick, and plan taking it to 800 degrees C for a total fuse.
I already have a mould made, just of plaster of paris. Would my glass be OK to this temperature, or will I need to make a new mould to include flint. It would be helpful and obviously save time if I could use the mould I already have made.
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