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 Replies: 11 / Views: 21,006 |
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Pillar of the Community
Canada
818 Posts |
I have several high grade 5 cent pieces in my collection that have black spots on them. I'm assuming this is from improper rinsing after dipping them (before I bought them). Is there anyway to remove these spots? I've tried pure acetone with no luck.
thanks in advance
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Rest in Peace
United States
4078 Posts |
With no picture my guess would be Quote:
carbon spot
A spot seen mainly on copper and gold coins, though also occasionally found on U.S. nickel coins (which are 75 percent copper) and silver coins (which are 10 percent copper). Carbon spots are brown to black spots of oxidation that range from minor to severe - some so large and far advanced that the coin is not graded because of environmental damage.
Im not aware of any method to eliminate this. Verdi-care may halt any further damage. |
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Pillar of the Community
Canada
3049 Posts |
If it's silver.. the black spots may just be toning ...
If it's copper or gold... it's probably a carbon spot..
The toning it's possible to address (contraversial but possible).... the carbon spots ... I'm not sure I have only had one really nice gemmy MS 64 with carbon spots that I have that I think would do well if those spots were removed professionally..
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Pillar of the Community
 Canada
818 Posts |
I have several coins with very similar toning and similar spotting. This is probably the worst.  |
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Pillar of the Community
Canada
3049 Posts |
That just looks like toning.. and there's not much you're going to want to do with that piece...
My best advice to reduce any further toning I'd say put it in an air tight...
Would like to see what others may say.. but this coin is NOT a candidate for a "dip" to get rid of the toning
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Pillar of the Community
Canada
818 Posts |
Thanks once again for your advice AgCoinAu. What do you think would happen to this coin if it was dipped?
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Valued Member
Canada
228 Posts |
Is that a die crack between the "I" in "DEI" and the rim?
As AgCoinAu mentioned, putting the coin in an air tight holder will slow the toning process. I may be off base here, but that said, in my opinion, this coin may actually benefit from further toning, so you may not want to slow down the process.
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Pillar of the Community
Canada
818 Posts |
Quote:
Is that a die crack between the "I" in "DEI" and the rim?
Yes it is, Pretty neat that it's right over the "I" isn't it? |
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Valued Member
Canada
228 Posts |
Yeah, it looks like it anyway.
I'm not sure that it would increase the value of the coin but it is an interesting feature.
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Pillar of the Community
Canada
818 Posts |
I should post some of my die cracked 5 cent pieces, I have some very nice examples.
Is it normal for toning to appear like this in localized areas? If you look at this coin, it almost looks like something was splashed on it. The overall appearance is dull which in my limited experience on the subject says dipped?
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Pillar of the Community
Canada
3049 Posts |
This is pretty normal toning patterns...
I think if this coin was dipped my fear is that those frosty surfaces would end up looking dead and dull...
An airtite will slow the toning process down some... I'm not sure if this coin toned in your posession as a result of your storage methods or if it toned like this in that past curator's posession. Your other option would be to allow this coin to tone a bit more.... now there is a discussion that could start getting a few opinions!
As of late I'm of the opinion that I don't like toning as it's almost a sign of corrosion.... But in the back of my mind I would like to take a few coins and put them in clamshells with brand new felt for 5 - 10 years to see the reaction.
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Pillar of the Community
Canada
618 Posts |
Anything that takes the black carbon off will destroy any surface lustre leaving a grey white residue--read up on a carcinogen Carbon Tetrachloride which was used in dry-cleaning.
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Replies: 11 / Views: 21,006 |
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Posted 05/19/2015 1:01 pm
