A mold is made in sections out of plaster and rubber. |
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Wax is brushed in each of the sections until the desired thickness is obtained. The wax will be replaced by bronze so the thickness of the wax will be the thickness of the bronze. |
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Sections of the mold coated with wax. |
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Wax bars called “sprues” are attached to determine where bronze will flow. A Styrofoam cup acts as a form for a funnel for the molten bronze. |
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The wax section with the sprues and cup attached is dipped into a ceramic slurry, a mixture of silica powder and a colloidal silica binder. |
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Then it is sprinkled with sand. |
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This is repeated until the desired thickness is obtained. In this case, 10 coats, which is about 1/2" thick. |