Help with discoloration

Discussion in 'Coin Chat' started by Scott White, Sep 23, 2020.

  1. Scott White

    Scott White Member

    Hello. I’m looking for some information on what can cause discoloration. Thanks in advance.
     

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  3. Collecting Nut

    Collecting Nut Borderline Hoarder

    Toning and chemicals are two items that will cause discoloration.
     
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  4. cpm9ball

    cpm9ball CANNOT RE-MEMBER

    Just about anything!
     
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  5. Oldhoopster

    Oldhoopster It seemed like a good idea at the time.

    The problem with trying to pinpoint the cause of PMD and environmental damage is that there are so many, many, many ways it could happen after it left the mint, unless you were there when it happened it's difficult to know for certain. That's why most members just say PMD or Environmental damage and leave it at that.
     
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  6. Penny Luster

    Penny Luster Supporter! Supporter

    Oil from our hands, going through the washing machine, spittle, scotch tape, carbon, low ph, high ph, sulfur fumes and moisture, humidity and dampness to name a few.
     
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  7. Clawcoins

    Clawcoins Well-Known Member

    don't forget urine / pee ....


    yeah, I'd go wash my hands too no matter what ... lol
     
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  8. John Burgess

    John Burgess Well-Known Member

    looks like it sat in the bottom of a moist car cupholder for a few months to me with the different shades of toning, indicates different exposures to liquid at different times but not enough to submerge the whole coin and tone it evenly.

    Just one of may opinions... lol
     
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  9. Scott White

    Scott White Member

    Will urine seriously do that?
     
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  10. Collecting Nut

    Collecting Nut Borderline Hoarder

    Yes, it stains copper all kinds of nice colors. Urine does contain ammonia.
     
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  11. Mountain Man

    Mountain Man Well-Known Member

    Try it. LOL
     
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