Bronze Sculpture

Bronze is the most popular metal for cast metal sculptures; a cast-metal sculpture of bronze is often called a bronze. Common bronze alloys often have the unusual and very desirable property of expanding slightly just before they set, thus filling the finest details of a mold.

Manufacturing Bronzes
The manufacture of bronzes is highly skilled work, and a number of distinct casting processes may be employed, including lost-wax casting (and its modern-day spin-off ceramic shell casting), sandcasting and centrifugal casting. In the lost-wax casting method, the artist starts with a full-sized model of the sculpture, most often a clay model. A mold is made from the clay pattern; a wax is then cast from the mold. The wax is then invested in another kind of mold or shell, which is heated in a kiln until the wax runs out. The investment is then filled with molten bronze.

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