7.8 Laminations
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Planchets are created from metal alloys. In the process of producing planchets, impurities can become part of the metal alloy. If sufficient impurities are present, the metal
may delaminate into separate layers. Generally the layers that separate are quite thin and will peel away from the coin after strike. Such coins are referred to as lamination errors.
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Shallow lamination across coin |
Lamination errors on twenty-cent pieces are seldom seen and are often mistaken for damage due to circulation or mishandling.
Two deep lamination errors
