The images to the left are examples of cents with
Lamination errors.
Laminations are a result of a coin being struck on
a defective planchet. Planchets can become
defective when dirt and impurities force the
planchet to crack & peel. Laminations can be a
thin raised piece of metal on the surface of the
coin (such as the top image) or a missing area of
the planchet (bottom image).
Laminations very in size and severity.