Bronze Sculpture & Artwork by Sister Marie Henderson, RSM |
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From that point sprues are attached and a rubber mold is made that is cradled in plaster and the original clay sculpture is removed. Wax is poured into the rubber mold in its place. Then the new wax sculpture is pulled from the rubber mold and checked by the artist for accuracy. This method is very precise, even to the inclusion of any fingerprints or precise detail that was found in the original clay. From this point a ceramic shell mold is then made by dipping the wax repeatedly into slurry, followed each time by coating the wet slurry with sand and a gravel-like substance to build up the ceramic shell. Many dippings are required and after this mold is thoroughly dry it is only then placed in a kiln and the wax melted from the interior. This leaves a perfect impression into which the molten bronze can be poured. If the original bronze art was complicated, multiple ceramic shells would be made and the pouring of bronze would occur into each. Then ceramic shells would be broken and chipped away and the final bronze would be free. The last steps include the cleaning of the bronze, welding of all pieces together and lastly, the application of the patina. This method is known as the lost wax method and is age old. Sculptures are available in your choice of two patinas that include:
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