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 Replies: 9 / Views: 1,229 |
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Valued Member
United States
382 Posts |
I was just looking at my Large Cent collection,they are in flips, I see that one of them has the green stuff starting. How do I get this off before it goes to other coins?
Thanks Tony
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Forum Kid
Kuwait
1523 Posts |
Could you post some pictures please?
Thanks!
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Pillar of the Community
Belgium
2078 Posts |
I guess that the first thing to do is to get them in plasticizer free safe flips
I had some 1960 sovereigns in old 2x2's developping green spots
Lucky they are largely gold and 48 hours in acetone was all that was needed now acetone is NOT recommended for silver or copper I understand and it will not stop the green anyway
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Valued Member
 United States
382 Posts |
Unfortunatly I have the tech to post pics but I am PC illiterate and have to settle on being a nonposter, sorry.
The flips I have are supposed to be safety flips? How do I get the green off.
Thanks Tony
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Pillar of the Community
United States
7123 Posts |
Hi Tony
I have not seen or heard of any product, (although I know that conservation companies have something that they use) that will not affect the patina of a copper coin when removing degritis.Even the examples I have seen that were professionally conserved had a change in the patina of the coin.
I have tried several things on circ wheaties, but have had no luck so far with any of my witches brew.
probly the best so far is a long term soak in virgin olive oil .
Rick
Edited by Metalman
12/01/2005 3:47 pm
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Pillar of the Community
Belgium
2078 Posts |
I never did this myself but people I know did you have to put the coin in a base solution (as opposed to acid solution ) and then use the torn of a rosebrush to scratch out any residue (ouch) and then wash in destillated water a few times Some will then put on an oil or vaseline or other surface protective anyway with green rot you can only stop further damage that is all  |
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Valued Member
United States
382 Posts |
I will try the olive oil, and be sure to check all my coppers too.
Thanks Tony
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Pillar of the Community
United States
1247 Posts |
There is a product called Koinsolv that claims to remove PVC: http://www.amosadvantage.com/scotto...%5Fno=&Tab=cI believe this is the stuff that replaced Dissolve which was also a neutral solvent. Dissovle I used for years as a rinse and never had any problems with it. It was eventually banned by the EPA and then Koinsolv came along to replace it. I haven't used Koinsolv so I can't say how well it works. Although it appears to be every bit as pricey as Dissolve was so I would hope it works. You also need to be sure your looking at PVC leaching and not the green crust that is pretty typical to find on coppers. I don't believe a solvent will remove green crust and if does you'll probably have a color void. |
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Valued Member
United States
382 Posts |
I just noticed the green, I know it wasn't on the coin the last time I looked at it. So maybe the chemical was there and it just grew? I am going to try the olive oil, I was thinking about linseed oil.
Thanks Tony
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Pillar of the Community
United States
2724 Posts |
quote:
Originally posted by tonphil1960
I will try the olive oil
NO! First, prior to doing any cleaning, test your method on something else, with NO NUMISMATIC VALUE. pick up a common dirty Wheat cent, and try your method first, before making any attempt with your coin. Green is a pretty common color on older copper. Koinsolv is not the best method, but will work. If the coin only has a small patch, dip a Q-tip in some KoinSolv and gently, GENTLY, (yes it bears repeating), work the Q-tip only on the area effected. Then rinse with DISTILLED water, and GENTLY pat dry. DO NOT RUB! Again, ONLY make this attempt after sacrificing a non-numismatic valued coin. |
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Replies: 9 / Views: 1,229 |
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Posted 12/01/2005 2:17 pm
