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 Replies: 17 / Views: 5,195 |
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Valued Member
United States
314 Posts |
I recently purchased a 1958 Franklin Proof, but when I got it home and took it out of its holder to put it into my CAPS album, I noticed that it had two small 'carbon spots' (?) on the back just up at the edge and also some carbon staining along a small section of the "serrated edge" of the coin. The coin is otherwise nice looking, but I am trying to collect very nice quality Franklins. Do small carbon spots like this impact the rating of a Franklin? Any way to remove it? Would Acetone help perhaps? I have also heard people mention something called MS73, but I don't want to do anything to mess-up an otherwise nice looking proof. I am attaching a photo that shows the spots - they are on the back only. Sorry so blurry, but hopefully you can get an idea of what they look like. I will try to take another photo if you think that would help. Regards, Michael  |
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Rest in Peace
United States
18456 Posts |
Michael , Do not use acetone or any other solvent on this proof , it will not work . Suck it up , you can't return it because you already removed the coin from it's holder . maybe some proof coin experts can advise you what to do with it .  |
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Pillar of the Community
 United States
2843 Posts |
"carbon spots" generally are in reference to copper coins. that looks like undesirable toning.
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Pillar of the Community
7234 Posts |
 . Carbon spots are exactly that - little black spots - yours seem to be some sort of blackish toning probably from a holder that it was in at one time Edited by Mark1959
09/15/2017 4:41 pm
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Bedrock of the Community
United States
94367 Posts |
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Rest in Peace
United States
17900 Posts |
No help for that.  |
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Pillar of the Community
United States
4469 Posts |
I have dipped modern proofs in acetone and it will not hurt the coin, but it will not remove toning spots. I would leave the the coin alone. You can not wipe or rub in any way the proof mirrors as it will leave fine hair line scratches. If you dipped the coin in EZEst, it could remove the toning spot, but could also leave a milk spot or black specs where the spot was.
Edited by Slider23
09/15/2017 9:21 pm
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Valued Member
United States
180 Posts |
You could try NCS, conservation service through NGC. I've never used them, just thinking out loud.
Maybe one oft the other members has utilized their services.
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Bedrock of the Community
Australia
21786 Posts |
The term 'carbon' spots is a misnomer. They are in fact, shallow areas of corrosion. The black is either a metallic sulfide or oxide, or a mixture of both.
That is why they are unaffected by acetone, which is an organic solvent. 'Carbon' spots are INorganic.
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Bedrock of the Community
United States
94367 Posts |
No wonder I got a D in chemistry.
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Valued Member
 United States
314 Posts |
Thanks all for the advice, and clarifying what this is and to not try to mess with it..
I am probably going to try to return the coin.. I purchased it a a local coin store.. and have purchased many other items from the store and they are usually pretty easy to work with.. although this will be a nice test of their "customer service"...
It was in a 2x2, and you couldn't really see the "spots"until I took it out to put it in my CAPS album.
Will look for another coin that doesn't have any spots...
They ruin an otherwise really nice looking coin, and I also worry that the toning may "grow" over time and make it look worse.
Michael
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Pillar of the Community
United States
4469 Posts |
If the coin was in a 2X2, and you are a regular customer, I would expect them to take it back.
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CCF Advertiser
United States
1533 Posts |
I bet those will dip right off with Jeweluster. I would dip it, but just for a second and rinse it thoroughly.
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Bedrock of the Community
Australia
21786 Posts |
It is VERY common to find 'carbon' spotting on Australian bronze proof coins.
That is the result of poor Mint packaging which offered little protection from their environment.
Even when they were specifically made for collectors in the period 1955 until 1966, they were still poorly protected.
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Moderator
 United States
188052 Posts |
Quote:
I bet those will dip right off with Jeweluster. I would dip it, but just for a second and rinse it thoroughly
This is something that should only be done after gaining some experience. If you have never used this stuff before, expect to ruin a few coins before knowing how to be successful. This is not to say it would not work. I am rather confident that Andrew99 could properly do what he has suggested. |
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Bedrock of the Community
Australia
21786 Posts |
Long experience and Jeweluster may well work with with circulated silver coins, but I have my doubts, when it comes to mirror cameo proof coins.
And I don't have the guts to try.
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Replies: 17 / Views: 5,195 |
Posted 09/15/2017 4:11 pm
