Undercooling
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