Définition

• Undercooling.  A casting anomaly in which the internal mass has not cooled properly creating an imperfection susceptible to deformation. Its closeness to the surface determines whether this can be observed in the finished cast piece.

  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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