Characteristics
Art Clay Bronze is a clay material made from alloy powder, binder and water that you can use to make a wide range of pieces such as jewelry, craft designs, and objects like sculptures and models. Art Clay Bronze can be fired and its alloy powder fuses together in an electric kiln using carbon under reducing atmosphere, with the resulting fired piece being solid alloy (Copper 90%, Tin 10%). The percentage of alloy powder in Art Clay Bronze in the clay state is 90%.
Art Clay Bronze has been developed after testing many different metal formulas to ensure the best golden color.
Bronze is an alloy formed with mixture of copper and tin, therefore it gives extremely high strength in both surface contact and bending pressure. Bending strength* of fired Art Clay Bronze is approx. 3 times harder than Art Clay Silver, and surface strength is approx. 2 times harder than Art Clay Silver 950.
*Bending strength is evaluated by force level in bending fired strip to 90 degrees. Higher force level means metal is harder to bend. This does not necessarily mean that Art Clay Bronze has high viscosity or density for reshaping.
Art Clay Bronze needs to be fired...
1. PREPARATION
If you fire a ring, place a circle of firing blanket along the inside band of the ring. This will avoid marks caused by carbon when the clay shrinks during firing. Spread more than 1 cm of activated carbon on the bottom of a firing pan. Place the piece on top of the carbon layer (if you fire multiple pieces together, always have at least 2cm carbon between pieces). Bury the pieces completely under 2cm carbon.
RAMP UP
Place the box farthest from the kiln door, and ramp up from room temperature to 820°C, taking at least 20 minutes to do so.
5. HOLD
Hold the kiln at 820°C for 2 hours.
6. COOL DOWN
Allow the bronze pieces to cool to room temperature before removing from the carbon.
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.