What is this green substance?

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  • TPring
    Paid Member

    • Sep 2017
    • 3120

    #1

    What is this green substance?

    I am not referring to verdigris but, a removable, waxy green coating that forms on the surface. Easily removed with a porcupine quill as seen in the pic.

    Mostly around EPU with clumps of it under the first U of UNUM and between the P and L.
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    Last edited by TPring; 02-06-2022, 09:31 PM.
    If you choose not to decide, you still have made a choice -- Freewill
  • willbrooks
    Die & Design Expert, LCF Glossary Author

    • Jan 2012
    • 9477

    #2
    Algae? Lol. I've seen "alive" coins before. Who knows. Could be a lot of things, I guess.
    All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

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    • mustbebob
      Lincoln Cent Variety Expert
      • Jul 2008
      • 12758

      #3
      It is PVC contamination.
      Bob Piazza
      Former Lincoln Cent Attributer Coppercoins.com

      Comment

      • willbrooks
        Die & Design Expert, LCF Glossary Author

        • Jan 2012
        • 9477

        #4
        Originally posted by mustbebob
        It is PVC contamination.
        Really? Interesting. So then why has it manifested in the recesses of the coin?
        All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

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        • Roller
          Member
          • Feb 2010
          • 6975

          #5
          Give it an acetone and/or Xylene bath. Depending on which or neither works you might be able to narrow it down.

          Comment

          • kloccwork419
            Banned
            • Sep 2008
            • 6800

            #6
            Originally posted by willbrooks
            Really? Interesting. So then why has it manifested in the recesses of the coin?
            Why wouldn't it? This coin looks like it had more more than what's shown and some was removed already. I dont think all of the green you see is from PVC, but the wax like parts that TPring asked about is.

            I would soak it in acetone. If its just a common wheat I would toss it back to circulation or experiment on it.

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            • TPring
              Paid Member

              • Sep 2017
              • 3120

              #7
              Originally posted by kloccwork419
              Why wouldn't it? This coin looks like it had more more than what's shown and some was removed already. I dont think all of the green you see is from PVC, but the wax like parts that TPring asked about is.

              I would soak it in acetone. If its just a common wheat I would toss it back to circulation or experiment on it.

              I used a porcupine quill to scrape some away but, will soak it in acetone.

              Not so ordinary -- DDO-2
              If you choose not to decide, you still have made a choice -- Freewill

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              • kloccwork419
                Banned
                • Sep 2008
                • 6800

                #8
                Then yes. Soak it. Didnt notice the VDB or I wouldnt have said that. Probably need to take a break. A lot going on

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                • willbrooks
                  Die & Design Expert, LCF Glossary Author

                  • Jan 2012
                  • 9477

                  #9
                  Originally posted by kloccwork419
                  Why wouldn't it? This coin looks like it had more more than what's shown and some was removed already. I dont think all of the green you see is from PVC, but the wax like parts that TPring asked about is.

                  I would soak it in acetone. If its just a common wheat I would toss it back to circulation or experiment on it.
                  I'm genuinely curious. When I've seen it before, it was on the high points of the coin where it actually makes contact with the PVC. I've never tried to remove it, but I always thought it wouldn't just wear off. Beats me.
                  All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

                  Comment

                  • mustbebob
                    Lincoln Cent Variety Expert
                    • Jul 2008
                    • 12758

                    #10
                    I'm genuinely curious. When I've seen it before, it was on the high points of the coin where it actually makes contact with the PVC. I've never tried to remove it, but I always thought it wouldn't just wear off. Beats me.
                    The PVC damage is waxy and soft. As such it can 'melt' into the devices. Since heat is one of the primary reasons for the PVC to break down in the first place, it really isn't limited to only the higher points of the coin. PVC damage in this state is easily removed with pure acetone.
                    Bob Piazza
                    Former Lincoln Cent Attributer Coppercoins.com

                    Comment

                    • willbrooks
                      Die & Design Expert, LCF Glossary Author

                      • Jan 2012
                      • 9477

                      #11
                      Thanks, Bob.
                      All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

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