1997 p Improperly annealed planchet jefferson nickel error shiney red for sale in Guttenberg, New Jersey

us coin error sale, 1997-p Improperly annealed planchet jefferson nickel error shiney red copper look
1997 p us coin jefferson nickel error Improperly annealed planchets red copper look
THIS IS A 1997 P JEFFERSON NICKEL ERROR Improperly annealed planchet , BOTH THE OBVERSE & REVERSE HAVE A STRONG AND BEAUTIFUL COPPER BRONZE LOOK FROM THE ANNEALING OVEN. . WHILE IN THE OVEN THIS NICKEL PLANCHET GOT SOME OF THAT COPPER BAKED INTO IT. .
info regarding this error:
Improperly annealed planchets: This form of error, formerly called "copper wash" or "sintered plating," is found on copper-nickel 5-cent coins and copper-nickel clad coins. The coins are found with a thin, varying layer of copper on their surfaces, sometimes cracking and peeling, and they are often varied in color, including bright copper, red, brown, gray and black. New research indicates the copper is intrinsic to the planchet and is not deposited on it from outside sources as was once believed when the phenomenon was called by the older, discarded terms "copper wash" and "sintered plating."
Researcher Mike Diamond queried Mint officials about this form of error in late 2009 and received this reply from the Mint in early 2010:
"I've consulted with our technical experts regarding the cause of the appearance of the coins in the photographs attached with your e-mail.
"This would result in migration of the copper and nickel to the surface of the blank. Since there is three times as much copper [as] nickel in the outer layer of these coins, the diffusion of copper to the surface will be significantly greater than the diffusion of the nickel, resulting in the reddish appearance noted.
"Depending on the time the blank sits in the annealer, and whether it is exposed to oxidizing conditions, various reactions can occur. This will result in the type of phenomenon shown in the photos, where a distinct layer of material forms on the blank surface (primarily copper, with a high degree of oxidation), which is quite brittle, and will break off in pieces. This will expose the original blank surface, which would also be oxidized, but closer in color to the original alloy. We have seen these types of blanks but only infrequently."
http://error-ref.com/Improper_annealing.html


Similar categories
Nearby Cities
Popular searches
Copyright © 2024 Americanlisted.com, All Rights Reserved.
Designated trademarks and brands are the property of their respective owners.