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Post a coin that was dipped and has since retoned.
oldcameoproofsguy
Posts: 3,174 ✭
The chemicals used to dip a silver coin, strip a very thin layer of the silver from its skin. Unfortunately the copper in the alloy does not follow. This leaves a skin on the coin that is more concentrated in copper than before. The stripped skin that is copper rich almost invariably retones a golden brown or golden amber color.
The below coin is a very obvious example of a coin that was previously dipped and has turned. The color is very typical of a conserved coin that has begun to retone. It is just my opinion that even "properly" conserved coins, given enough time and the right environmental exposure run the risk of oxidation even in the best holders. Many will not turn if done properly, but I think it's a difficult thing to predict.
Post a dipped coin that has turned so that we can see what these coins look like.
The below coin is a very obvious example of a coin that was previously dipped and has turned. The color is very typical of a conserved coin that has begun to retone. It is just my opinion that even "properly" conserved coins, given enough time and the right environmental exposure run the risk of oxidation even in the best holders. Many will not turn if done properly, but I think it's a difficult thing to predict.
Post a dipped coin that has turned so that we can see what these coins look like.
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And I must also admit I think I might have had something to do with "Converting" you. Enjoy the hobby guy.
You are correct, not acetone. Referring to something more along the lines of
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Ken
This 1830 half dime was bright white when I bought it over 10 years ago. A year or so later it turned to this color, and it's remained the same since then. Everybody makes mistakesk, and this is one of mine. The toning is not attractive, and some day I might replace this piece. It is currently in an NGC MS-63 holder.
This 1873 with arrows quarter was also bright white when I purchased it. Subsequently it has toned to this brown color. I don't mind this one as much. As a matter of fact as 1873 with arrows quarters go, this one is quite attractive. A lot of these coins have really ugly reverses, which stem I think from dies that were pushed beyond their usage limits or dies that were not re-polished frequently enough. This coin is in an NGC AU-58. I thought that I got hosed on this a bit. I thought that the coin should have been an MS-62 or so.
The lesson here? Chances are if a coin that is dated from the early 20th century or before is bright white and shows no toning AND it's NOT a Morgan silver dollar, it's been dipped. If it's been dipped and it's not been properly rinsed afterwards, it will tone quickly. If it has been properly rinsed, the chances are very good that it will still tone, but much more slowly. The reason is the the virgin metal that has been exposed with react with the atmosphere. Original coins build up a shield that will not change much over a peroid of many years.
siliconvalleycoins.com
Classic dip retone. I didn't do that one either.
Former ANACS 62, now PCGS 63.
It was light brown & lackluster from an old dip when I got it so I cracked & dipped it to clean it up and got a 63 on it. It quickly turned gold again, but my scanner makes it look lots darker than it really is. Is really very very light gold colored.
Former NGC 64, now PCGS 64.
I cracked it and tried to get the black off the rev but it was too dark. The center cleaned up white but quickly retoned.
Former NGC 64 DPL, now PCGS 64 DMPL.
I did this about 5 years ago trying to get rid of the black spot. The black spot was a piece slag & quickly retoned.
Some of the above coins could have been sold to me as "attractive, originally toned" coins, and I wouldn't have known the difference. That kind of thing probably happens all of the time. I'm looking forward to seeing even more pictures.
Dan
mcinnes@mailclerk.ecok.edu">dmcinnes@mailclerk.ecok.edu
<<<Generally untoned with a good strike overall. A few small marks are seen on the obverse and the luster is too subdued for a finer grade.>>>
<<<Light yellow-green patina hugs the borders of this sharply struck Choice proof Half.>>>
<<<A light film of gold and blue coloration is found over the deeply mirrored fields that accentuate the frosty gold-colored design elements. This specimen is a gorgeous proof that is blemish-free.>>>
<<<A stunningly beautiful, untoned specimen that boasts admirable technical merits in addition to its stark cameo contrast. Proofs from this year often possess this attribute, but the outstanding Half offered here shows it off better than most.>>>
Dog97, I remember you saying once that you had a Morgan that had turned in the holder.
Here's one that I sold that had begun to really turn. Sometimes the golden color isn't too destracting but in this case it really was. The brownish color was starting to really haze over the fields.
Perhaps the price is just too steep.
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You awake with a start to just the beating of your heart.
Just one man beneath the sky,
Just two ears, just two eyes.
Where did you hear that ?
It makes sence that the chemical makeup of the coin is altered on the skin. Silver sulfite (the oxidized part of the skin that causes toning) does not form the same way on a dipped coin. The copper theory makes sense to me, but I admit after a little more research, that it could be wrong.
I'm sorry for stating that as fact without checking to make sure of it's validity.
The Ludlow Brilliant Collection (1938-64)
<< <i>I am stunned!!!...and obviously have MUCH to learn. I thought graders such as PCGS... could tell that a coin had been dipped and would NOT holder it. >>
There is "market acceptable" dipping. Telling what is and isn't is the fun part
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U.S. Nickels Complete Set with Major Varieties, Circulation Strikes
U.S. Dimes Complete Set with Major Varieties, Circulation Strikes
Billy
1892 PCGS PR63CAM
Can people also show coins that have been damaged by dipping? I've seen some where the acid dip removes the origional toning only to leave behind a white etching into the coin's surface.
FrederickCoinClub
michael
I bought this Buffalo nickel on Feb-16-2004 from DLRC.
Sep-06-2005, it has now retoned very nicely. In hand it has target toning.