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<p>[QUOTE=&quot;V. Kurt Bellman, post: 2130418, member: 71723&quot;]All I am doing is relaying here what I have been told by numerous dealers who have repeatedly insisted that WHILE THERE ARE MANY KINDS OF POTENTIAL CONTAMINATION, the phenomenon known as &quot;milk spots&quot; are unique in two ways: 1) no chemical attempt to remove them has thus far been successful, and 2) they are nearly always pretty close to round.</p><p><br /></p><p>Now, I suppose if you find a contaminent that meets 1 but not 2, you MAY be dealing with a variant of the same cause. I don&#039;t know why this is so, but it is (I checked last night) - I own about 70-90 or so ASE&#039;s, only 2 in slabs (Christmas gifts), and of the ones I checked last night, not a single one has any milk spots or any other garbage on them. Some in Danscos, some in Saflips in a 2x2 file box, and the proofs in OGP. I don&#039;t get it. One reason I may not is that I didn&#039;t buy many at all during the 09-11 silver craze, just enough to keep my sets whole. I notice that a lot of pieces of that era have spots. I also own ZERO &quot;First Strike&quot; or &quot;Early Strike&quot; examples, nor have I followed a pallet full of monster boxes being pushed along the F.U.N. Show bourse floor like a tomcat following a female in heat like I&#039;ve observed some doing. (What a spectacle!)</p><p><br /></p><p>Now, as to the chemistry: two thoughts, one I know, and one I only suspect. 1) Silver chloride is photoreactive, i.e., its chemistry alters on exposure to light, especially bright light over time. Normally, this occurs as a latent image that is subsequently developed in a darkroom. Silver chloride lies at the heart of the old warm-tone photographic papers such as Kodak&#039;s Portra and Agfa&#039;s magnificent Portriga-Rapid. That MAY account for the browning of the milk spots on that ASE.</p><p>2) The universe&#039;s most insistent coupler to Chlorine is Sodium. I suspect that a bath in HOT salt water would at least alter milk spots in a noticeable way if they are indeed silver chloride. But then again, so would a photographic developer. How do you feel about black milk spots? <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie33" alt=":cigar:" unselectable="on" unselectable="on" /> OTOH, a bath in Sodium Thiosulfate, the primary ingredient in photographic Fixer might remove the spots. Silver &quot;wants&quot; the thiosulfate, and sodium &quot;wants&quot; the chlorine. The spot MAY simply dissolve.</p><p><br /></p><p>Almost makes me wish I had a milk spotted coin so I could play with it. Almost.[/QUOTE]</p><p><br /></p>

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