Definizione

• Lost-wax.  The casting process which requires a wax pattern, expendable, to which is attached expendable sprues and completely surrounded by a refractory material. The mold is heated, the wax melts and is poured off (dewaxing). The mold then is the vacant space, a cavity, formed by the wax pattern. Lost-wax is particularly suitable to reproducing sculpture in-the-round and especially by making hollow casts (with a core). Bronze is widely used for making lost-wax casts.
  Bas-reliefs are suitable to lost-wax casting and medals two-inch and larger can be made by this process. Lost-wax was the technique of Pisanello, it was popular in the Renaissance and continues to the space age today.
  Lost-wax is known by the French term cire-perdue, it is the basis of
  investment casting and precision casting in modern production technology.  See also cast, casting.

  excerpted with permission from

  An Encyclopedia of Coin and Medal Technology

  For Artists, Makers, Collectors and Curators

  COMPILED AND WRITTEN BY D. WAYNE JOHNSON

  Roger W. Burdette, Editor

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