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Acetone Mishap On Copper Coins

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Pillar of the Community
United States
3098 Posts
 Posted 07/11/2009  4:59 pm  Show Profile   Bookmark this reply Add wd1040 to your friends list
Another note, gasoline can also melt Styrofoam.
Bedrock of the Community
United States
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 Posted 07/13/2009  6:22 pm  Show Profile   Bookmark this reply Add just carl to your friends list
My suggestion is if your going to use Acetone, use a Glass dish, not a jar. Just make sure a glass dish is clean, pour some Acetone into the dish, they the coin(s). Attempt to use glass utinsils for placing the coin(s) into the dish and removing them. Rinse with distilled water. In most jars it is difficult to place or remove the coins. A dish makes that easier. Also, easier to turn the coin over.
Acetone will not hurt Copper coins. I presently have about 10 cents in a jar of Acetone for a few weeks now. Just forgot about them.
Bedrock of the Community
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10284 Posts
 Posted 07/13/2009  6:32 pm  Show Profile   Bookmark this reply Add TNG to your friends list
I used a Pyrex covered dish with a paper towel folded into quarters a few times I suppose to slow evaporation I could have put another paper under the lid for a bit of a seal.
Using a flat bottom and fairly large dish made it easier to get to the coins.
Pillar of the Community
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 Posted 07/13/2009  10:38 pm  Show Profile   Bookmark this reply Add Jaobler to your friends list
If you tightly cover your glass container with intact (no holes!) aluminum foil, then use a big rubber band around the foil to keep it tight, you can slow the evaporation of the acetone. I've found this helpful when I want to try an overnight soak.
Bedrock of the Community
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 Posted 07/15/2009  6:16 pm  Show Profile   Bookmark this reply Add just carl to your friends list

Quote:
If you tightly cover your glass container with intact (no holes!) aluminum foil, then use a big rubber band around the foil to keep it tight, you can slow the evaporation of the acetone. I've found this helpful when I want to try an overnight soak.


If your doing this for coins, your just wasting time. As I mentioned I have some coins in a jar with Acetone for weeks now. Still there and absolutely no difference after the first few minutes. I don't need them so might just leave them there for a few years.
Pillar of the Community
Australia
1295 Posts
 Posted 07/17/2009  6:41 pm  Show Profile   Bookmark this reply Add markn to your friends list
Some reading I did a while back suggested if you're going to use acetone on copper then DONT use it in sunlight. Acetone with UV light can cause a reaction with copper. Take a look here:

http://www.sciencedirect.com/scienc...dcadc2981d63
Bedrock of the Community
United States
20753 Posts
 Posted 07/17/2009  6:55 pm  Show Profile   Bookmark this reply Add just carl to your friends list
I've read silly stuff like that previously and maybe even that one. Way, way back I thought there was a possibility that for some odd reason it would be possible. I placed several coins, pennies, Nickels, Dimes and a Quarter in a jar of Acetone. For one day that jar sat on the inside of my garage window sill. I then moved it to the outside of that same window sill, but it was only in the Sun for a few hours. I then moved that same jar directly into the Sun, on a picnic table where it sat for the entire day. After several days of this and absolutely nothing, I removed the coins. There was nothing in the way of anything to any of the coins except the Roosevelt dime did appear a little cleaner. None of the Pennies (cents) vanished, corroded, tarnished, rusted, etc. They just looked the same as when I put them in.
Of course I would really need to place such a jar on a rocket ship, shoot out into space, move into an orbit around the Sun, exposing these coins. Then possibly something would happen.
Pillar of the Community
Australia
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 Posted 07/17/2009  6:59 pm  Show Profile   Bookmark this reply Add markn to your friends list
Hi Carl,

Never actually seen the effect myself either, but someone did warn me about it a while back so better to be safe than sorry. Should we email NASA and suggest it as an experiment on the next space shuttle launch?

Mark
Bedrock of the Community
United States
20753 Posts
 Posted 07/17/2009  7:01 pm  Show Profile   Bookmark this reply Add just carl to your friends list

Quote:
Some reading I did a while back suggested if you're going to use acetone on copper then DONT use it in sunlight. Acetone with UV light can cause a reaction with copper. Take a look here:


One more thing is to be carefull of internet articles and stories where they want you to pay for additional information. If you noted on the one you mentioned, they want $31.50 for details. They discuss Ambient Light whatever that is supposed to be. And Water Vapor, not just water, moisture, ice cubes in a Martini.
I presently have about 10 pennies in a jar of Acetone. I'll move them out into the Sun for a few weeks as soon as the rain stops here.
Bedrock of the Community
United States
12437 Posts
 Posted 07/18/2009  12:48 am  Show Profile   Bookmark this reply Add biokemist6 to your friends list
justcarl,
ScienceDirect is a subscription scientific journal service but you can also purchase individual articles, it is not a scam site. I have access to ScienceDirect at work, I will see if I can post a complete link on Monday. Otherwise, I will try to give a synopsis of the paper.
Bedrock of the Community
United States
20753 Posts
 Posted 07/18/2009  1:01 pm  Show Profile   Bookmark this reply Add just carl to your friends list

Quote:

justcarl,
ScienceDirect is a subscription scientific journal service but you can also purchase individual articles, it is not a scam site. I have access to ScienceDirect at work, I will see if I can post a complete link on Monday. Otherwise, I will try to give a synopsis of the paper.


I am well aware that it is not one of the many scam or misinformed sites. That is why when I first read that one I experimented for a long, long time with Acetone with every denomination of coins in continuous variations of light, temperatures and humidity ranges.
None of my experiments with any Copper coins of any years or wear have shown any signs of anything in the way of corroding, evaporating, toning, tarnishing, vanishing, changing, etc.
I still have about 10 Cents in a jar of Acetone now sitting on my picnic table in the Sun. Now going on a few weeks of shade, Sun, high humidity and still nothing.
I now suspect I'm using the wrong Sun.
Sure wish they would all change into Dimes or Quarters.
Valued Member
United States
68 Posts
 Posted 10/10/2009  5:08 pm  Show Profile   Bookmark this reply Add Kevin Vaillancourt to your friends list
I have never tried this before and was wondering if anyone else had some before and after pictures?
Bedrock of the Community
United States
20753 Posts
 Posted 10/10/2009  7:01 pm  Show Profile   Bookmark this reply Add just carl to your friends list

Quote:
I have never tried this before and was wondering if anyone else had some before and after pictures?

Actually I did take some photos of a well damaged large cent someone gave me. It was dark, dirty, had some corrosion on it too. It was put into Acetone for a few days, then water was added and put into the
Sunlight. Since not much ever happened, I then tried Laquer thinner, baking soda and water and now in Olive Oil. So far it basically still looks the same. I'll take some more photos after it soaks for a while more.
Valued Member
United States
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 Posted 10/10/2009  11:59 pm  Show Profile   Bookmark this reply Add Kevin Vaillancourt to your friends list
Carl thanks I look forward to the pictures.
Pillar of the Community
United States
3077 Posts
 Posted 10/11/2009  08:36 am  Show Profile   Bookmark this reply Add yotie to your friends list

Quote:
the wrong sun


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