Pot Melt Schedule

I usually use a schedule like this for pot melts:

• 100C/hr to 220C (180F/hr to 438F) for 20 minutes ; approximately the crystobalite inversion temperature – to be kind to the pot.
• 220C/hr to 570C (396F/hr to 1090F) for 20 minutes; approximately the quartz inversion temperature – again to be kind to the pot.
• 220C/hr to 677 (396F/hr to 1250F) for 30 minutes; the bubble squeeze temperature to allow larger bubbles to escape from the pot before melting begins.
• 330C/hr to 850C (595F/hr to 1564F) for 120 minutes;  to ensure there is plenty of time to empty pot. 
• AFAP to 805C (AFAP to1482F) for 30 minutes; to allow thickness equalization and also to allow bubbles to pop and seal.
• AFAP to 482C for 120 minutes; this temperature is for Bullseye, but substitute the annealing temperature for your glass.
• 55C/hr to 427C (100F/hr to 800F), no soak (for 6 to 12mm thickness)
• 99C/hr to 370C (180F/hr to 700F), no soak.
• 200C/hr to 150C (360F/hr to300), end.
• Allow to cool to room temperature in the kiln

Revised 5.1.25