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Re: Coin Chemistry

5cents, i have to concur.

I agree that 'toning' is "post mint occurance", as it is the oxidation of the metal(s) in the composition of the coin, due to the oxygen in the air. If you want to prevent this from happening, try storing the coin in nitrogen.

Dick, 3/7/2011
CCRS member since: 7/15/2010
Posts: 1421


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Postings in this thread

Coin Chemistry (jmc, 3/7/2011)
 Re: Coin Chemistry (Dave in the Grove, 3/7/2011)
 Re: Coin Chemistry (5cents, 3/7/2011)
  Re: Coin Chemistry (Dick, 3/7/2011)
   Re: Coin Chemistry (token hawk, 3/7/2011)
    [this post has been deleted by its author] (3/7/2011)
     [this post has been deleted by its author] (3/8/2011)
      Re: Coin Chemistry / grading observations (jmc, 3/9/2011)
      Re: Coin Chemistry / grading observations (AussieBob, 3/9/2011)
      Re: Coin Chemistry / grading observations (5cents, 3/9/2011)

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