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Debonded, Debonding

Debonded, Debonding.  The separation of an outer clad layer of metal either before or after striking. It is caused by poor adhesion during the bonding process. On a struck piece debonding is considered a clad metal anomaly because of the incorrect preparation of the strip and planchet. It would be described in numismatic literature as a lamination error. The purposeful debonding (as with skeleton scrap) to recycle the metal is accomplished by heating the clad strip to a specific temperature, holding the metal at that temperature until the bond weakens, then physically pulling apart the separate layers.

excerpted with permission from

An Encyclopedia of Coin and Medal Technology

For Artists, Makers, Collectors and Curators


Roger W. Burdette, Editor

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