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 Replies: 45 / Views: 31,473 |
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New Member
United States
41 Posts |
This is a 1997-p sintered Jefferson nickel error. Both the obverse & reverse have a strong and beautiful copper bronze look from the annealing oven. Cent planchets would have been in the oven before this nickel went in. There would have been cent copper plating floating around the oven in dust form. While in the oven this nickel planchet got some of that copper baked into it. This is a great example with a shiney red copper look.   *** Edited by Staff to remove YELLING ***Edited by jfit
01/01/2011 8:40 pm
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Bedrock of the Community
United States
62064 Posts |
A few flaws with this theory:
1. Cent planchets are not annealed.
2. Copper plated zinc for this year.
3. Cents are prepared from an outside source. Then struck.
4. Nickels have a large amount of copper in them (75% copper 25% Nickel)
5. if a copper coin is placed into a container with a different type of planchet (IE: steel) and a acid was added, the copper from the coin would transfer to the surface of a second coin.
As to what happened to your coin? It just couldn't happen in the manner you assumed.
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Pillar of the Community
United States
1699 Posts |
I read an article about this a while ago. It occurs in the annealing point of production. If a coin sits within the heating chamber too long or is exposed to a reactive atmosphere during this process the copper and nickel separate to the top. The color may be red because there is 3 times as much copper in the outer layers as there is nickel. I think that's how it goes. Experts, please correct me if I'm wrong.
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New Member
 United States
41 Posts |
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Rest in Peace
United States
1943 Posts |
ebay is the worst place to get information. People post their coins with the best information they can think of to get the most money, whether the information is true or not doesn't matter to alot of them. Be very cautious when looking over ebay lots.
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Pillar of the Community
United States
1027 Posts |
A minor point but vinegar is acetic acid, not phosphoric. Same result. In any case, the ebay story is bogus and a coppery nickel isn't worth $25. There are too many ways to fake this to accept such a coin as a mint error. Edited by clairhardesty
01/02/2011 2:38 pm
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Pillar of the Community
United States
974 Posts |
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Pillar of the Community
United States
958 Posts |
I stand corrected
Vinager contains acetic acid
Cocacola contains phosphoric acid.
I dont know why I typed vinager is phosphoric acid for , but yes many soda drinks contain phosphoric acid
in a high concentration phosphoric acid is used to turn rust into non rust metal
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New Member
United States
41 Posts |
this coin is from 2004 same color ,is for sale from ctf error coin.. http://errorcoins. (009) This link is not allowed by the Staff .com/2004-Westward-Journey-Keelboat-Nickel-Improperly-Annealed-Planchet-Error-P563934.aspx |
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Bedrock of the Community
United States
12437 Posts |
The OP's coin would be an improperly annealed planchet error. How can you tell? Look at the luster- an altered coin will have impaired or no luster but that nickel has booming luster. The planchet is improperly annealed before the coin is struck and the process of striking the coin is what imparts luster. Anything done to the coin after striking will also affect luster. Mike Diamond addressed this error type in another post a few days ago- Quote:
Sintering has been debunked as the cause of discolored quarters. We now speak of "improperly annealed planchets". Prolonged exposure to heat or too much oxygen in the annealing oven causes copper and nickel atoms to migrate and segregate out into relatively pure layers. This explanation comes from the Mint and is supported by close study of affected coins. |
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Pillar of the Community
United States
958 Posts |
the luster would not be affected with a plating , a lil hand polishing and it will look shiney.
Boiling in vinager at high hear for 30-40 minutes wont effect the luster ether , in fact it would prob shine it up a bit as the mild acid cleans the surface
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Locked
822 Posts |
Quote:
the luster would not be affected with a plating , a lil hand polishing and it will look shiney. Luster and shiny are 2 different things and who said anything about plating? Quote:
Boiling in vinager at high hear for 30-40 minutes wont effect the luster ether I think you make this stuff up. |
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Bedrock of the Community
United States
12437 Posts |
Luster and shine are definitely not the same thing. Quote:
in fact it would prob shine it up a bit as the mild acid cleans the surface Yep, it would clean the luster right off the surface, removing metal in the process. |
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Pillar of the Community
United States
958 Posts |
I dont make this stuff up , I restore Buffalo nickles so I know what heat and plating can do to nickle. I have tried electro etching , electro plating , heat , forging hot/cold rapid heating and cooling plating is just ecthing backward dip a copper penny postive side in solution, nickle side ground. The copper gets etched and goes to the ground . Plus if you even read the post above the annealing oven. Brings the copper out of the coin when heated to high. If you heat the coin in the oven ( not with direct heat like a flame but a oven ) it does the same thing after the coin is minted. It just changes color. crank your oven at 550 and let it " anneal your nickles" it wont effect the luster. You might get a lil rainbow toning with the copperish color |
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Pillar of the Community
United States
958 Posts |
Also what gave his away is the spot by the liberty on the obverse, its copper on the surface very faint inthat spot its been scratched off.
i bet that copper color would come off with a lil scotch bright, its just surface color.
The heat makes the copper color deeper then the surface it actually changes the color of the metal no scrubbing will make it come off.
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New Member
United States
41 Posts |
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Replies: 45 / Views: 31,473 |
Posted 01/02/2011 12:43 am
