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 Replies: 21 / Views: 4,168 |
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Pillar of the Community
Canada
1461 Posts |
The primary use for acetone is removing PVC and minor debris. To say that acetone is 100% safe is a bit of a misnomer. If silver coins are left too long in acetone, they will discolor to a slight tone of yellow. Acetone will also easily discolor copper and in much shorter order. I certainly wouldn't use it on anything with trace of original coin color.
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Pillar of the Community
Canada
1984 Posts |
SPP, when you say it is a photochemical reaction, does that mean it is safer to use acetone on copper in a low light environment? I have always gone to the back yard, which is not low light at all.
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Pillar of the Community
Canada
2519 Posts |
I've read that using acetone on red copper under sunlight can tone it purple. I haven't tried this myself, I don't want to mess with acetone right now because there's a lot of static electricity around in winter.
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Pillar of the Community
Canada
2632 Posts |
Power washed the house last weekend and mowing the lawns this weekend(in a T-shirt)..what winter? .. lol
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Pillar of the Community
 Canada
535 Posts |
I have never heard of acetone turning copper purple. I don't want any purple coins so someone else can try that. Removing the serial number was literally dipping a q tip in acetone and using it like an eraser. Gone within seconds. I have never used acetone on coins before. I use it for prep work for metal art pieces I create.
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Pillar of the Community
Canada
2519 Posts |
I have yet to confirm that but not now, not when I make a bright blue spark when getting my finger near something. It's a fire hazard.
The serial numbers are very easy to remove and if you do it slowly enough you won't damage the bill making it look like there isn't a serial number in the first place.
Acetone can also remove the intaglio.
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Moderator
 Canada
10460 Posts |
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2781 Posts |
acetone on copper  |
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Valued Member
Canada
228 Posts |
OK, correct me if I'm wrong on this but wouldn't the use of acetone count as cleaning and therefore decrease a coin's value?
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Pillar of the Community
Canada
2781 Posts |
depends on the coin, and the method of "cleaning" (as the term covers soooooo many methods/variables).
generally speaking acetone rinse is considered ok as it removes organic material but doesn't react or alter the coin surface itself.
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Moderator
Canada
10460 Posts |
Quote:
but doesn't react or alter the coin surface itself ...except, mint state copper or bronze!!  "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2519 Posts |
I skipped right to the discussion and conclusions but that was an interesting read. Interesting how metals catalyse reactions. Thanks for the link - I might find that site useful finding journals.
Acetone itself does nothing to the metal so I don't consider it cleaning. It's the acetic acid produced that reacts with the copper.
Edited by Altaira
03/07/2015 10:38 pm
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Pillar of the Community
Canada
2781 Posts |
Quote:
but doesn't react or alter the coin surface itself Quote:
...except, mint state copper or bronze!! well ya, but who would clean MS copper or bronze ?!?!?!  |
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Pillar of the Community
United States
604 Posts |
Quote:
well ya, but who would clean MS copper or bronze ?!?!?! Maybe there is a big greasy finger print that needs to be removed...or maybe the collector has a routine to rinse with acetone prior to storage regardless of condition. Copper turning purple after an acetone bath is new to me but I guess under the right/wrong conditions it can happen. I haven't experienced it and hope I never do. |
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Pillar of the Community
Canada
1984 Posts |
Or to remove lacquer.....
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Posted 03/06/2015 1:55 pm
