Saturday, October 9, 2010

Spares




When making rough shell molds to cast carving wax into, make sure to make the spares large enough. If the part is going to be solid, the only consideration is that the spare be large enough to pour the carving wax into the mold. If the part is going to be hollow, the spare should be large enough so that excess wax can be poured out when the walls of the casting have reached the proper thickness. If the spare is too small, and the hole closes before you can empty the excess wax into the wax pot, a straw can be pushed through the opening to let excess wax out.






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