This product is a mixture (not an alloy) of 89% copper and 11% tin. The bronze alloy is formed during sintering when the copper and tin metals melt into each other. This version has a reddish color to the finished metal. BRONZclay Original shrinks about 20% of its original size during sintering. The density of BRONZclay is about 90% of cast bronze. When properly sintered, BRONZclay can be bent and formed. Keep in mind that bronze is a very hard metal and is much more difficult to form and drill than fine silver. Holes should be pre-drilled in advance and as much finishing work as possible should be done prior to firing. BRONZclay Original must be fired in activated carbon in a kiln. The wattage and size of the kiln is used to determine the firing temperature. The duration and rate of heat for the firing program is determined by the thickness of the pieces being fired. Thicker pieces require a longer firing schedule. Pieces that are 3mm or less in thickness can generally be fired in 3 hours. Each additional millimeter in thickness adds additional time to the firing schedule.

This product is an alloy of 89% copper and 11% tin. Instead of using copper and tin powders mixed together, this version starts with powdered bronze (the copper and tin have already been alloyed). This version has a golden color to the finished metal. FASTfire BRONZclay shrinks less than 10% of its original size during sintering. The density of BRONZclay is about 90% of cast bronze. When properly sintered, FASTfire BRONZclay can be bent and formed. Keep in mind that bronze is a very hard metal and is much more difficult to form and drill than fine silver. Holes should be pre-drilled in advance and as much finishing work as possible should be done prior to firing. FASTfire BRONZclay must be fired in activated carbon in a kiln. For most firings, the kiln can be fast ramped to target temperature and held for 2 hours. For high powered kilns, the heating is slowed. For pieces that are to be formed, the firing schedule is extended by one hour.