PART V. Planchet Errors:
Alloy Errors:
Lamination:
Retained Lamination
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.
A retained lamination error is a flake that remains attached to the main body of the coin.
A piece of this of this 1960D small date Lincoln cent has peeled up and folded over. Another area of delaminating metal can be seen to the left of the retained lamination (indicated by white arrows).
Images are courtesy of Paul Ihrig.