PART V. Planchet Errors:
Lamination Errors:
Lamination on Clad Coins
Definition: A lamination error occurs when metal flakes off the surface of a coin or planchet. It is generally believed that the flaking, peeling, and cracking is due to impurities in the alloy which causes metal to separate along horizontal planes of weakness.
Because copper-nickel clad layers are already very thin, it is quite unusual for lamination errors to develop within a clad layer. Yet such errors do occur. They can be distinguished from “partial clad” errors because the copper core is not exposed in a lamination error.
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A small section of metal on this 2002P Indiana Statehood quarter has peeled away and detached itself from the coin’s surface. Another area of delaminating metal – still attached – can be seen to the left of the area with the missing surface metal (indicated by white arrows).