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 Replies: 13 / Views: 2,277 |
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Pillar of the Community
United States
1536 Posts |
Does this look like PVC slime on this coin below? I was going to soak it in acetone to get it off but first I want to determine that it is in fact from PVC.  |
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Pillar of the Community
United States
9792 Posts |
Need larger photo to tell, PVC slime is usually very green. Once it comes off if it sat too long you will see evidence of pitting where it was.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector. See my want page: http://goccf.com/t/140440 |
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Pillar of the Community
 United States
1536 Posts |
Looks like PVC to me. Edited by buddy16cat
07/05/2013 10:28 pm
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Moderator
 Australia
16810 Posts |
I've found PVC goo tends to form on the high points, where the metal was in strongest contact with the plastic, rather than the low points. It also doesn't tend to be pale green like this.
90% silver shouldn't form verdigris. It's either severe environmental damage, or some foreign substance that just happens to be pale green. If the latter, then acetone might remove it anyway, even if its not actually PVC goo.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Moderator
United States
23522 Posts |
With all due respect, Sap, I've seen plenty of PVC infestation which began in the field of a US coin. Given that it's a function of the outgassing, I can see how direct (or close) contact with the PVC material could accelerate the start - I've seen it in interior devices too - but it's likely to start anywhere on the coin. It seems to like intersections between field and device.
I strongly urge you to get this one into acetone, buddy. I've seen this stuff that color before; I think it's early in the infection.
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Moderator
United States
16677 Posts |
I agree. Soak this in acetone overnight.
swcoin.ecrater.com
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Pillar of the Community
United States
1536 Posts |
It is already in acetone. After taking a look at this photo, I thought it was the best thing to do. I was thinking that as well, that if I caught it early in the infestation damage could be minimal from it.
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Rest in Peace
United States
4078 Posts |
Quote:
It is already in acetone  |
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Pillar of the Community
United States
5205 Posts |
Only one way to find out: soak it and let us know.
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Bedrock of the Community
United States
19935 Posts |
It looks like garden variety verdigris to me. PVC residue is almost instantly removed with acetone. I've never had to soak more than a couple hours myself. Also, if you soak and use a toothpick (while under fluid), most PVC comes off in seconds. Anything remaining is verdigris which cannot be removed with acetone.
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Pillar of the Community
United States
1536 Posts |
Yes, I soaked this overnight a couple times and it did not come off. I put it in distilled water afterwards and used a toothpick and yet nothing. Maybe I should just try the toothpick in acetone. I used a cotton swab dunked in acetone. I think it may not work. Maybe try a couple drops of Verdi-care? I didn't realize verdigris affects silver. Maybe it just toning? It came with a lot where one has some obvious rainbow toning. Of course that one is a keeper, picked out for my own collection.
Edited by buddy16cat
07/20/2013 9:57 pm
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Bedrock of the Community
Australia
21786 Posts |
Might be a localised slightly richer amount of copper in the alloy at this point.
After reading the preceeding in this thread, and if it is a copper rich area,
I am tempted to conclude that the green gunk is inorganic, and will be very difficult to remove,
without leaving some evidence of it's removal.
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Bedrock of the Community
United States
19935 Posts |
Quote:
Maybe try a couple drops of Verdi-care? Absolutely, just a drop or even a half drop. Put it on, let it sit 10 minutes, then use a toothpick (while under fluid). I've seen this kind of verdigris come right off using that technique. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Valued Member
United States
293 Posts |
buddy16cat -- It very well could be PVC and if it was in one of them darn CoinMaster albums from the 70s then it certainly is PVC. This is deal where the coin may need to sit in acetone for about a month and even then you may not be able to get it off. Another thing --- Ssuper Ddave is correct --- PVC can and will "settle" or "eat into" any part of the coin. Could be the high point's but it could also be anywhere in the flip where the flip starts to break down. I had an experience with some Eisenhower dollars. Busted up a set that was in a CoinMaster [YUCK!] Album. After I treated the coins with acetone I spent a good 15 minutes getting the PVC goo off of my hands. It was that bad. Good thing CoinMaster isn't around anymore. |
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Replies: 13 / Views: 2,277 |
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Posted 07/05/2013 10:25 pm
