Removing milk spots from coins & rounds

Discussion in 'General Precious Metals Discussion' started by Dan, Jan 10, 2011.

  1. systematic

    systematic Well-Known Member

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    warm to near boiling cloudy ammonia turbo charges it :p

    watch out for those fumes ...
     
  2. Guest

    Guest Guest

    Maybe use the eraser first to remove those most prominent milk spots, then cloudy ammonia to restore the lustre?
     
  3. leo25

    leo25 Well-Known Member Silver Stacker

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    i tried this with a clean soft eraser and found this:

    -for the new 2011 coin with a more matt finish it worked well.

    -for the 2010 coin with the polished surface i found it did more harm then good, but my milk spots are not that bad to begin with.
     
  4. systematic

    systematic Well-Known Member

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    wet cotton bud and bi-carb ....
     
  5. Guest

    Guest Guest

  6. boneyard

    boneyard Well-Known Member Silver Stacker

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    2011.

    BBUMP.
     
  7. kramer

    kramer Member

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    Magic eraser?? :) Those things do wonders!! Don't know how they would go on milk spots..
     
  8. iceblue

    iceblue Well-Known Member

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    I have basically designed a system on paper that uses "pressure" without actually touching the surface of the coin. When I have the money and time to build it, I will see how it goes. Of course I wont know if it works until I try!!
     
  9. SpacePete

    SpacePete Well-Known Member Silver Stacker

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    I had an idea that utilized surface scanning, a 3D model or surface depth map of a coin and precision picosecond pulsed lasers for micro polishing and surface redistribution which should result in removal of AgCl and contaminants, and elimination of any micro recess caused by consumption of the silver by the milk spot (see electron microscope images from the Perth mint).

    Then I realized it would be ridiculously expensive.

    [​IMG]

    [youtube]http://www.youtube.com/watch?v=AR5cpuWHD1M[/youtube]
     
  10. Fat Freddy

    Fat Freddy New Member

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    Realistically speaking... If there was a cost-effective way to remove milk spots from silver coins without abrading the surface of the coin and thereby destroying any value beyond spot, the major and most notorious milk spot-producing mints would be screaming the happy news from the highest towers. The fact that no such announcements have been made tells us everything we need to know about traditional "remedies" like erasers, jeweler's cloths, files, rasps, wire brushes, etc...
     
  11. Gatito Bandito

    Gatito Bandito Active Member

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    And on the off-chance that any of these coins happen to survive for another century or three, and somebody then decides to get 'em slabbed? Will be in for a bit of a disappointment with that non-numerical Details grade.


    Do the future generations a favor & leave them spots alone, folks..
     

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