Franklin's - in Mint Sets, with White Corrosion

Discussion in 'US Coins Forum' started by USS656, Dec 8, 2019.


    GDJMSP Numismatist Moderator

    Just in case I didn't make my meaning clear before. I don't think there ever was any reaction of any kind with the silver.

    I'm convinced that what you've got there is nothing more than a coating of "something" that is sitting on top of the silver.

    An apt comparison would be paint on metal. The paint causes no reaction in the metal - it merely coats it. And no I'm not suggesting it actually is paint, if it was paint it would have been dissolved by now. But at some point, whatever that stuff is, it was in liquid form, somehow got onto the coin before it was packaged and dried there.

    I suspect that if you could remove it, you'd find the metal underneath little changed.
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  3. USS656

    USS656 Here to Learn Supporter

    Well, I will keep working at it Doug, I will for now expect the worst and hope for the best. Thanks :)
  4. messydesk

    messydesk Well-Known Member

    "Milk Spot Cameo RARE L@@@@@K!!!!!111"
    USS656 and juris klavins like this.
  5. -jeffB

    -jeffB Greshams LEO Supporter

    If long soaks in water, acetone, xylene, and ammonia haven't substantially affected the spot, I'm running out of ideas. It looked like something was happening with the ammonia -- did you see any sign of white stuff diffusing into the liquid, even if most remained on the coin?

    If none of those work, I'd start to think about scraping. Actually, I'd try first to get the best microscopic view I could, just to see if I can tell whether it's sitting on the surface, dug into the surface, or part of the surface.
  6. juris klavins

    juris klavins Well-Known Member

    Rare Ben Franklin Half Dollar Error - barber shop lather face variety - $10,000 OBO :p
    USS656 likes this.
  7. USS656

    USS656 Here to Learn Supporter

    Yes, when wiping with Q-tip the ammonia gets cloudy. I will continue this process until there no longer seems to be a gain.

    Had minor surgery today so not sure if I will do much today besides rest on the couch and likely take a few naps. Nothing significant and hopefully tomorrow will be up and about.
  8. -jeffB

    -jeffB Greshams LEO Supporter

    Best wishes for a quick recovery. The coin's waited for over 50 years, it can wait a while longer. :)
  9. USS656

    USS656 Here to Learn Supporter

    Thank you!
  10. USS656

    USS656 Here to Learn Supporter

    48 hours more in Ammonia, continues to lighten in very small degrees.

    -jeffB and Johndoe2000$ like this.
  11. Johndoe2000$

    Johndoe2000$ Well-Known Member

    It's getting there...:cool:
    I can now confirm it is indeed a Franklin half dollar. :wideyed:
    USS656 likes this.
  12. Michael K

    Michael K Well-Known Member

    It might be clean in a month. Change the ammonia every couple of days.
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