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Cleaning Coins With Acetone.

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jbuck's Avatar
United States
187446 Posts
 Posted 12/04/2017  5:56 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
And to make sure any traces are removed, make that final rinse a FLOWING rinse (pour fresh acetone over the coin, not dipping it into a bowl of acetone.)
Agreed.
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Taiwan
192 Posts
 Posted 12/04/2017  11:38 pm  Show Profile   Bookmark this reply Add Guybrush to your friends list Get a Link to this Reply
@arvan I guess the copper would still react, even though it's just a thin plating.
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United States
160 Posts
 Posted 12/05/2017  08:49 am  Show Profile   Bookmark this reply Add jmgi to your friends list Get a Link to this Reply
So maybe acetone is not harmful to get on your skin for a short time, but are there any particular kinds of coin tongs that you could use instead to lower the coin into the acetone and retrieve it? I see some coin tongs have rubber or plastic covered tips, which probably are not compatible with the acetone, do they make tongs that are all metal, have not seen them? Thanks!
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Israel
2 Posts
 Posted 01/08/2018  05:08 am  Show Profile   Bookmark this reply Add 055296222 to your friends list Get a Link to this Reply
Personaly I never clean coins with aceton. used to work for one of the most famouse collector and cleaning coins was my everyday work. It depends on how dirty is the coin so if its very dirty, take 1/4 of a big spoon of ANT poisen and 3/4 of water. wrap the coin with silver paper and put the coin inside to 2-3 minutes. if its not enough,take of the silver paper and put it for 2-3 minutes again. wash it with water each time you'r doing it but no more than 2-3 times.
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BadThad's Avatar
United States
19930 Posts
 Posted 01/08/2018  6:54 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply

Quote:
Personaly I never clean coins with aceton. used to work for one of the most famouse collector and cleaning coins was my everyday work. It depends on how dirty is the coin so if its very dirty, take 1/4 of a big spoon of ANT poisen and 3/4 of water. wrap the coin with silver paper and put the coin inside to 2-3 minutes. if its not enough,take of the silver paper and put it for 2-3 minutes again. wash it with water each time you'r doing it but no more than 2-3 times.


Ant killer, "silver paper" and water....sounds quite professional. You must work for NCS.



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Spence's Avatar
United States
34393 Posts
 Posted 01/08/2018  9:29 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply
I'm with @BT on this one--ant poison sounds a little more intense than I am willing to go no matter how dirty a coin is.

Also, @055296222, based on your location and your other post, I'm thinking that you are typically cleaning ancient coins that have been sitting in the ground for centuries if not millennia. I would argue that the methodology and rationale changes when you are talking about US modern/classic coins vs. ancients. As a general rule, acetone is the only solvent used with modern coins. Welcome to CCF, by the way!
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SsuperDdave's Avatar
United States
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 Posted 01/08/2018  11:24 pm  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply

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I would argue that the methodology and rationale changes when you are talking about US modern/classic coins vs. ancients.


This is true, which is why I chose not to have a heart attack when he posted that.
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BadThad's Avatar
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 Posted 01/09/2018  10:22 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply

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This is true, which is why I chose not to have a heart attack when he posted that.


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rockfish's Avatar
Canada
217 Posts
 Posted 01/10/2018  09:42 am  Show Profile   Bookmark this reply Add rockfish to your friends list Get a Link to this Reply
On BadThad's advice from previous posts, I now use xylene when soaking copper which works better.
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Bas S Warwick's Avatar
New Zealand
526 Posts
 Posted 05/27/2018  01:15 am  Show Profile   Bookmark this reply Add Bas S Warwick to your friends list Get a Link to this Reply
Just a question re acetone and aged silver coins.

I bought a very badly tarnished 1952 South African 2½ Shillings recently - purchased well below bullion -
.50 silver content

Will acetone make it look good/better?


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sel_69l's Avatar
Australia
21786 Posts
 Posted 05/27/2018  03:43 am  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
Given enough soakage time, acetone will remove almost anything organic,
but will not touch any inorganics, such as silver/copper oxides/sulfides, which are responsible for good or bad toning, good or blotchy patination.

It must be remembered that some acidic oraganic substances, such as the natural oils in your skin, are capable of forming insoluble in anything complex organic/metallic compounds, which become part of a coin's surface. This is how non removable fingerprints can be formed.
Exposure to airborne cooking fat vapors (also acidic), are pretty much disastrous to coins as well.

If you don't think that your fingers are naturally greasy, try a little experiment.
Put a couple of dilute drops of caustic soda liquid on your fingers. A reaction happens, where the skin oils combine with the the hydroxide radicals (OH-), to form a natural soap. Most soaps are very slightly basic (ph+) anyway. That is why your hands feel clean after washing them in soap and water.

I am not a fanatic about gloves, when handling coins. In fact, I don't use them at all.
I just was my hands thoroughly, and have found that is perfectly good enough, over my decades of experience in handling coins.
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Conder101's Avatar
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 Posted 05/27/2018  05:51 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
I bought a very badly tarnished 1952 South African 2½ Shillings recently - purchased well below bullion -
.50 silver content

Will acetone make it look good/better?

Acetone removes organics, it will not affect tarnish.


Quote:
ake 1/4 of a big spoon of ANT poisen and 3/4 of water.

There are many types of ant poison, your going to have to be more specific.
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Bas S Warwick's Avatar
New Zealand
526 Posts
 Posted 05/27/2018  8:18 pm  Show Profile   Bookmark this reply Add Bas S Warwick to your friends list Get a Link to this Reply
Thank you Sel_691 and Condor101

Your comments and advise are greatly appreciated
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 Posted 05/28/2018  09:45 am  Show Profile   Bookmark this reply Add Imag8r to your friends list Get a Link to this Reply
Hello
New to this—i was told/read "do NOT clean your coins "so have not touched my coins at all—so its ok to clean coins with soap and water and ok to clean with acetone?—thnx
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thisistheshow's Avatar
United States
987 Posts
 Posted 05/28/2018  10:01 am  Show Profile   Bookmark this reply Add thisistheshow to your friends list Get a Link to this Reply

Quote:
New to this—i was told/read "do NOT clean your coins "so have not touched my coins at all—so its ok to clean coins with soap and water and ok to clean with acetone?—thnx


This is a very common question you are asking. You should never improperly clean your coins. Using acetone or soap and water, if done correctly, will not render your coin improperly cleaned.

In almost every scenario, using any type of cloth or rag to clean your coin will leave it improperly cleaned because there will be hairline scratches. Some will advise using a q-tip, but this can be risky and leave hairline scratches if there is any foreign substance there. Also, using acetone on copper has been known to permanently affect the surface.

The experts hopefully will correct me if I am wrong on any of this.

Edited to add: when the advise is given to never clean your coins, the "improperly" part is implied. And most inexperienced collectors will always clean using a rag of some kind, so this will always create hairline scratches and visible evidence which cause the coin to be ungradeable and often unsellable.
Edited by thisistheshow
05/28/2018 10:09 am
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