定義

• EPNS.  Electroplate on nickel-silver. Nickel-silver is very hard but a gray color; plating can add a gold or silver color.

  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

人际关系