定義

• Cabinet Friction.  Slight surface wear on a coin or medal, usually on the reverse, from its tray or container. Cabinet friction first appears on high points as bright areas of wear, also known as contact marks. Some numismatic writers state the term is also a fanciful expression for wear on an uncirculated item.
  Reference:                                                                                                                                 
  NE42 {1982} Doty, p 44.

  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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