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© 2008 Forster Studio
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The process of creating a sculpture in bronze is very mystifying to most people. We have been asked the question hundreds of times: "How do you that?"
The process of bronze casting is, in
fact, complicated, each step is labor intensive and
can be time consuming.
The steps to casting a bronze are quite simple and easy to understand. The initial sculpted piece is first covered with a rubber mold, creating a hollow version of the sculpture. Hot wax is then poured into this mold and poured out again, leaving a shell of wax, which, when removed from the mold, is a hollow wax version of the sculpture. The inside and outside of the wax is coated with a fireproof mold material called the investment. When dry, the investment is heated to melt out the wax, leaving a gap. Molten bronze is than poured into "the gap". Then the whole piece is cooled and the investment is broken off, leaving a hollow bronze reproduction of the original sculpture, right down to the fingerprints. This is then cleaned up, a process called chasing, which is the removing of the surface imperfections using tools designed to work with metal and a patina, or chemically induced color, is applied. The bronze is mounted on a base, and is finished.
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