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Thread: Chemist expert question

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  1. #1
    us
    Feb 2012
    2,741
    2291 times
    Coin roll hunting

    Chemist expert question

    Can the green patina that you find on some old cents contaminate other cents that it Touches. When I come across some during searches & sorting, I just dump them. Or, how would I get rid of it on Keeper cents.
    A2coins and PetesPockets55 like this.

  2. #2
    us
    ebay "ulster-relic"

    Dec 2012
    port ewen ny
    AT-PRO
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    All Types Of Treasure Hunting
    Honorable Mentions (2)
    acetone kills verdigris--- and cross infection always shows in rotted pennies next to good ones. even clad can get infected with soylent green
    PetesPockets55 and A2coins like this.

  3. #3
    us
    Jun 2013
    East Tennessee
    6,798
    6380 times
    Yes as port ewen ace eluded to! If you check active Verdigris, you will find that on most coins that are infected, the Verdigris is moist. Because of this, Verdigris can and will migrate to other coins that are touching any infected coins. Also, depending on what media the infected and non-infected coins are stored in (plastic bag, plastic tube, paper bag or other) and if they are stored together, it is likely that Verdigris can migrate across the media and infect other coins.
    Last edited by huntsman53; Apr 19, 2019 at 10:13 AM. Reason: Correction.

  4. #4
    us
    Feb 2012
    2,741
    2291 times
    Coin roll hunting
    Good info to know guys, thanks. I'll make sure to pitch back any.
    A2coins likes this.

  5. #5
    Charter Member
    us
    Tommy

    Dec 2015
    Ann Arbor
    Equinox 800
    19,600
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    All Types Of Treasure Hunting
    Honorable Mentions (2)
    Good to know thanks
    Still Available ​Approved TreasureNet Stickers
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  6. #6
    us
    Wood Butcher

    Apr 2013
    Indian River Co.
    299
    323 times
    All Types Of Treasure Hunting
    For coins you are just tossing anyway you can experiment with hydrogen peroxide. I've had limited success removing verdi and well as soil from dug cents. They will still get a details grade but can be the difference between seeing a variety or not. One thing that is suppose to help with verdi is "Verdi-care". It really does a good job and is relatively inexpensive because the bottle really goes a long way.
    I got mine off Ebay for about $8
    Last edited by PetesPockets55; Apr 28, 2019 at 10:52 PM.
    Nitric and huntsman53 like this.

 

 

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