Yesterday I posted a Lincoln that had plating sanded to reveal the zinc. Is that how die strikes the planchet so that the plating process will fill in the area to give coin a raised appearance? And if so had plating process filled in area in second pic would it be considered a doubled die? First pic is the 1999 D Lincoln I submitted yesterday. Second third and forth pic are from my 1983 S Presidential Prestige Set. Any help is greatly appreciated.
Planchets used by the US Mint for the cent are obtained from Jarden Zinc. Here is a photo of their barrel plating process.
Not that I would but if the coin was sand blasted to remove plating would two strikes appear or only one? My close up pic is really bad but it matches the pattern of the 1999 as far as appearance without the plating is why I am asking. It has the exact same appearance as the word LIBERTY on the 1999 D Lincoln I mean.
Just one. The "doubling" on split plate doubling is an illusion. As the coin is being struck the metal is expanding outward radially away from the center. Along the outer edges of the letter the plating can split from the expantion and the copper is carried outward exposing a "shadow" that appears like a doubled image at the outside of the letter. This "doubling" is NOT raised above the surface of the field.
Not that unusual on the 1983 S proofs. That was the first year of the copper plated zinc proofs and the mint did not have experience with proof Zincolns and how the plating would hold up with the double striking. In later years planchets for the proof cents had a thicker plating layer which greatly reduced the problem.
