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 Replies: 19 / Views: 3,834 |
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New Member
United States
24 Posts |
im trying to use acetone on a Walking Liberty half dollar and acetone wont take off the pvc, it IS PVC, not damage left from pvc. I have soaked it for 10-15 hours now and it looks the EXACT SAME AS IT DID before I soaked it. HELP?   Edited by Tracelol
06/15/2012 3:02 pm
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Bedrock of the Community
United States
12437 Posts |
If acetone is not removing it, then it is not PVC residue. You should not need more than a few minutes of soak time to remove anything that can be removed with acetone, 10-15 hours is overkill. Unfortunately, I cannot tell what is on your coin from the provided photos but it could be corrosion that would not be touched by an organic solvent.
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Pillar of the Community
United States
4337 Posts |
you should not soak the coin for that long...stop cleaning it at this point before you hurt it, ya?
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New Member
 United States
24 Posts |
acetone will not hurt coins, they can be soaked for weeks in it. Its a green substance, I dont see what else it could be as it wasnt there a few months ago
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Pillar of the Community
Canada
4944 Posts |
Quote:
I dont see what else it could be as it wasnt there a few months ago You should put the coin in a normal 2x2, I am not sure what type of holder it is in but it must have pvc in it. |
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New Member
United States
24 Posts |
i guess at some point it was in a pvc holder, but currently it is in a MYLAR holder, which contains no pvc
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Pillar of the Community
Canada
4944 Posts |
Yeah, I use Mylar holders for my banknotes. I thought that's what that was, just wasn't sure. It sort of looked like a coin flip.
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Bedrock of the Community
United States
36710 Posts |
Looking at the rough area just in front of the date makes me think the PVC damage has eaten into the surface. I don't think there is much you can do at this point.
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New Member
United States
24 Posts |
i dont think the pvc has damaged it too badly, if at all. But it wont come off! how do I get it off? acetone soaking hasnt worked
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Bedrock of the Community
United States
36710 Posts |
If it has eaten into the surface, you won't get it off.
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Valued Member
United States
227 Posts |
Edited by donkrx
06/15/2012 7:33 pm
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Bedrock of the Community
Australia
21786 Posts |
PVC may be or not be guilty, it depends on where the coin has been stored. Coins can be affected by any number of other aggressive storage environments, where PVC cannot be blamed.
The clear PVC material used in the manufacture of album pages is composed of PVC with a softener (known as a plasticiser) to make it pliable.
PVC album pages over the long term, can affect coins in two ways:
1.) The plasticiser can leach out as a gas, which can give coins a foggy appearance, most noticeable on high grade silver coins. This fogginess may be removed with acetone.
2.) Over the longer term (usually years), there can occur a slow acid attack from the chlorine from the PVC, which will turn coins darker, the silver ones at a slower rate, and if left, will turn them black. This darkening will not be removed with acetone, because the coin has sustained a chemical attack by the chlorine.
The fogginess and the slow acid attack usually happen at the same time.
If you wish to store your coins in Mylar 2x2 cardboard holders as I do, use archival quality album pages, which are not made from PVC. These pages are more expensive to buy and may be harder fo find, but the expense is justified if you think your coins are valuable enogh.
Edited by sel_69l
06/15/2012 8:04 pm
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Pillar of the Community
United States
2936 Posts |
As a very interested observer on this, what is the chemical composition of Dansco album slides? Hopefully they do not contain PVC as I have mondo bucks worth of coins in my Danscos... PG
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Pillar of the Community
United States
4132 Posts |
The slides are not PVC/vinyl. I believe they are acetate, which should be safe for coins.
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Bedrock of the Community
Australia
21786 Posts |
Some storage problems can arise from the long term use of PVC album pages, not from the use of the Mylar windowed 2x2's in them.
For long term storage, I would NOT recommend the use of PVC album pages in association with PVC album pages. Non PVC album archival quality album pages which accommodate 2x2's are available.
Edited by sel_69l
06/17/2012 12:59 am
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Valued Member
United States
227 Posts |
I had around 30 coins in these baseball card plastic sleeves, mostly coins of little value but I still wanted to take care of them. I left them in there for like 2-3 weeks and 2-3 of them had the green PVC slime on them. One has a nice big clump of it....... so it does not take much time apparently, lol. Fortunately I got the more valuable pieces out a lot earlier and those seem to be OK.
Can the PVC damage appear after a (clean, undamaged) coin is removed from a holder with PVC in it?
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Replies: 19 / Views: 3,834 |
Posted 06/15/2012 4:27 pm
