The faster way to fire! FASTfire BRONZclayTM metal clay drastically cuts your firing time-making it ideal for production work, the classroom, or for those times when you just want to bring your creations to life a bit quicker. With FASTfire BRONZclay, you can fire your pieces in 2 hours or less (depending on the thickness of your piece, the size of your firing pan, and the type of kiln). Just like original BRONZclay, FASTfireTM BRONZclay provides an incredible artistic range. And, because it is bronze, it is also so economical that you can use it for large pieces-even sculptures-very affordably! It can be pinched, rolled, sculpted, cut or manipulated any way you like. Then fire it, and the binder burns away, leaving a solid, pure bronze object. Create jewelry, jewelry components, or custom-crafted specialized tools. Package of 100g of FASTfire BRONZclayTM metal clay. Size: 100 grams Form:Clay Composition: Metal powder (90% copper, 10% tin), water & non-toxic binding materials. Shrinkage: 5-10%. Firing Temp.: Ramp at 1525°F (829°C) per hour. Hold at 1525°F (829°C) for one hour (total firing time is less than 2 hours). Please Note: FASTfire BRONZclayTM must be embedded in coconut shell-activated carbon inside a firing pan with a slotted lid during firing. Carbon, firing pan and lid are sold separately. Because kilns vary, try a test piece in your kiln according to the enclosed instructions. IMPORTANT: We do not recommend firing loose gemstones directly in FASTfire clay as the stones tend to be damaged during firing.