High temp release for casting glass.? Answered
I cast in glass (1750 F.), I currently use yogurt containers as the mold walls (I am currently limited to casting objects that fit in a cylindar 4" diam. X 3.5"). I usually use pre-made ice cube molds into which I pour 'composi-mold' for the positive to be cast in high temp mold material for the negative. The limit I have is due to casting in my microwave - the kiln uses magnetite agitated by the microwaves to produce heat. My problem is the unpredictability of my release material; sometimes the piece just drops out and sometimes i have to clean the glass piece - any suggestions on high temp releases?