Discussion in 'Coin Chat' started by BadThad, Sep 8, 2010.
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I know many think that the print is caused by the ridges of the fingerprint whorls rather than the valleys, but I think the opposite as the component that causes the corrosion are the merocrine sudoriferous glands which secrete mainly salts and water, which collects in the depressions, since the ridges are used for gripping. The end verdigris is probably caused by the sweat being squeezed out between the coin and the valleys and deposits outside the pressure area. IMO.
Thad, my understanding is that the acetone will only stop the spread of the verdigris, right? The green will still exist---it just won't spread, right? Will the acetone stop or ruin the rainbow? I'm wanting to keep the nickel for its rainbow, but I don't want to keep it if verdigris continues to spread or fear it may 'contaminate' other coins in my collection.
No, acetone will not remove or stop verdigris. However, it will dehydrate it and slow additional formation to a crawl if you store the coin in something like an Air-Tite holder immediately after rinsing.
Be sure to keep all coins with verdigris far, far away from your other coins. It can absolutely spread from coin to coin. I've found a couple "mated pairs" of cents that prove verdigris can spread by contact.
VERY VERY COOL example! Do you mind if I save and use your pictures?
Also, I don't need any more coins with verdigris.....trust me on that. LOL
I'll just kiss the rainbow goodbye. I don't want a coin with the green monster staring back at me. Thanks for the info, Thad.
Why don't you just conserve the coin to get rid of the verdigirs?
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