Mints purchase long strips of metal which are fed through blanking machines that punch out disks known as blank planchets or simply as planchets or blanks on which coins are struck.
Penny lamination error.
One thing i suggest doing to definitely rule out pmd such as adhesive residue is to carefully apply acetone to the surface for a few minutes and see if the aberration rubs off.
Lamination errors can develop before or after the strike.
Split planchet errors occur on solid metal coins such as alloyed coins like bronze pennies or copper nickel five cent coins and occur due to impurities in those planchets.
An example of a common issue with a lamination is this 1958 d lincoln cent with an easy to see attached planchet lamination on its obverse.
In the case of clad coins the outer layer may be completely or partially missing on one or both sides.
Lookup coin values for good very good fine very fine brilliant uncirculated proof conditions and ms grade.
Coin value price chart for planchet errors errors.
This determines the size and shape of eventual coins.
How much planchet errors errors are worth.
Lamination errors are planchet errors in which the surface of a coin cracks and flakes.
Coins for sale for planchet errors type errors items.
Lamination errors may be missing or attached to the coin s surface.
Split planchet errors are also similar to lamination errors which occur when parts of the coin flake off due to impurities or other abnormalities in the planchet.