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VOCABULARY TERM: DEBONDED, DEBONDINGHere's another entry from Dick Johnson's Encyclopedia of Coin and Medal Terminology. This is a short one, but I thought it would be a good follow-on to last week's entry on clad coinage; specifically, what happens when the cladding comes apart - either by mistake or on purpose. I added an image from Error-Ref.com. -Editor 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.
Undated clad layer from a Roosevelt dime (Courtesy Heritage Auctions)
To read the Error-Ref.com article, see:
To read the complete entry on the Newman Numismatic Portal, see:
To read the earlier E-Sylum article, see:
Wayne Homren, Editor The Numismatic Bibliomania Society is a non-profit organization promoting numismatic literature. See our web site at coinbooks.org. To submit items for publication in The E-Sylum, write to the Editor at this address: whomren@gmail.com To subscribe go to: https://my.binhost.com/lists/listinfo/esylum All Rights Reserved. NBS Home Page Contact the NBS webmaster 
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