Different firing timing and temperature on each 99.9% Silver Clay.Clay Fahrenheit Celsius TimePMC 1650°F 900°C 2 hoursPMC+ 1650°F 900°C 10 minutesPMC+ 1560°F 850°C 20 minutesPMC+ 1470°F 800°C 30 minutesPMC3 1290°F 700°C 10 minutesPMC3 1200°F 650°C 20 minutesPMC3 1110°F 600°C 30 minutes