Purple Lincolns?

Discussion in 'US Coins Forum' started by rlm's cents, May 2, 2010.

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  1. robbudo

    robbudo Indian Error Collector

    Doesn't the purple come from oxidation?
     
    robbudo, May 4, 2010
    #21 + Quote Reply
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  3. mralexanderb

    mralexanderb Coin Collector

    Nice group of coins. I like the purple woody.

    Bruce
     
    mralexanderb, May 4, 2010
    #22 + Quote Reply
  4. BadThad

    BadThad Calibrated for Lincolns

    No, oxidation deepens the brown on a copper coin.
     
    BadThad, May 4, 2010
    #23 + Quote Reply
  5. robbudo

    robbudo Indian Error Collector

    Then what chemical reaction turns them these hues?

     
    robbudo, May 4, 2010
    #24 + Quote Reply
  6. jello

    jello Not Expert★NormL®

    Carbon will tone silver .
    as for copper heat and most anything cause it to tone. that why the 2009 P&D mint set were so late the cents were toning before the could get them packaged
     
    jello, May 5, 2010
    #25 + Quote Reply
  7. BadThad

    BadThad Calibrated for Lincolns

    BadThad, May 5, 2010
    #26 + Quote Reply
  8. jello

    jello Not Expert★NormL®

    BadThad
    I knew I was forgetting something and sulfur was one :thumb:
     
    jello, May 5, 2010
    #27 + Quote Reply
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