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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
21788 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
21788 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
189702 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
21788 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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Pillar of the Community
5464 Posts |
My first thought after seeing the coin... Those are "not" small carbon spot. I wouldn't touch it. But good luck with whatever you decide.
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Pillar of the Community
United States
7375 Posts |
Dipping a proof coin is risky. I like the "return" suggestion best. It's a very nice coin, but not rare or crazy valuable, so your LCS that you frequent often should work with you.
Edited by edweather
09/18/2017 08:34 am
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Posted 09/15/2017 4:38 pm
