Definition

• Vacuum Degassing.  A method of eliminating trapped or occluded gas (bubbles) from cast metal or plaster models by placing the cast object – mold and all – in a vacuum
  container and pumping out the air.

  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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