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 Replies: 100 / Views: 9,716 |
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Bedrock of the Community
United States
11912 Posts |
I don't concede that acetone is harmless on the surfaces of silver coins, but let's assume that is true. One problem with this dogma is that there may be an unknown substance on the surface of a coin that could react with the acetone and damage the coin.
The chemist that developed verdicare is a proponent of carefully applying the solvent ladder. That means first rinsing the coin in distilled water. Then soaking in acetone, and perhaps later resorting to other, harsher solvents. I read his instructions. The reason for the distilled water rinse is to try to remove any residue from the coin, especially those that could negatively react with acetone and other solvents. You never know what is laying on the surface of a coin that has been around for scores or hundreds of years.
But you can cling to your dogma and keep suggesting that acetone can never harm a coin. Without qualification, you are needlessly leading fellow collectors toward unnecessary risks.
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Pillar of the Community
United States
8715 Posts |
Quote:
But you can cling to your dogma and keep suggesting that acetone can never harm a coin. I will, except for red copper coins. |
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Bedrock of the Community
13014 Posts |
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Without qualification, you are needlessly leading fellow collectors toward unnecessary risks. That's not really a risk any more than leaving your house is. The real risk is people trying to work on expensive coins that don't really know what they're doing |
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Moderator
 United States
189919 Posts |
Acetone is an organic solvent. I am not aware of anything that it can react or combine with that would then damage the coin, but I will defer that confirmation to a knowledgeable chemist.
What I do know is that acetone can remove organic material that may have been "protecting" the coin from toning, while an unprotected area was free to react with the environment. When acetone removes the protective material you will see a difference between what was covered and what was not. That difference might be unattractive.
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Valued Member
United States
484 Posts |
The toning is worrisome and the rims look to be filed AU otherwise
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Pillar of the Community
United States
8715 Posts |
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I think I'm going to take it to an NGC-certified dealer in my area and send it off to NCS. That sounds like the best idea. It will also get certified by NGC, which is a good idea considering its value.  Edited by SilverDollar2017
05/05/2018 10:14 am
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Bedrock of the Community
United States
94367 Posts |
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Pillar of the Community
United States
1959 Posts |
The acetone didn't hurt the coin. It didn't help it either. No harm no foul. A good student will learn.
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Bedrock of the Community
United States
94367 Posts |
 Q.E.D. |
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Pillar of the Community
United States
4471 Posts |
The coin looks like an AT experiment gone bad. I agree with Baseball21, send the coin in for conservation to NGC or PCGS or leave it alone.
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Pillar of the Community
United States
3479 Posts |
Using a conservation subsidiary of NGC wouldn't help this coin. You would just end up with a cleaned-looking au-58 coin with the same annoying watermarks. If you think this coin looks unappealing now, just wait till they clean it. Ask heymikep about the disappointing results and customer service.
If the OP were to get lucky, he might be able to lure in a few risk-tolerant sld collectors with the coin as is. The obverse has a few things going for it. But I can guarantee those few would quickly disappear once the coin has a cleaned look.
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Pillar of the Community
United States
7641 Posts |
I'm with the blotched AT voices on this one. Somebody out in coinland knows who did it and what they did.
Looks like they unloaded as fast as they could when they saw the results.
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Pillar of the Community
United States
824 Posts |
MikeF, . Take a look at this thread and see what NCS did, http://goccf.com/t/294788. You will need to read all of the posts in the thread. |
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Moderator
United States
189919 Posts |
Quote:Take a look at this thread and see what NCS did, http://goccf.com/t/294788. You will need to read all of the posts in the thread. Oh my.  |
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Pillar of the Community
United States
3479 Posts |
HeyMikeP's post should be made sticky, so that it sits at the top of the grading forum as a warning to anyone considering using NGC's 'conservation service'. We can do better at home with household chemicals. Not to mention the Horrible customer service that came with it.
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Replies: 100 / Views: 9,716 |
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Posted 05/04/2018 11:38 pm
