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<p>[QUOTE=&quot;GDJMSP, post: 7640509, member: 112&quot;]Ya know, years ago when I first found that Stony Brook paper, and it took a lot of looking to find it, the only reason I was doing the looking to begin with was to find some scientific reference to what I, and many others, had been seeing happen with our own eyes for many years. Namely that copper sometimes reacts with acetone causing the copper to sometimes turn weird colors.</p><p><br /></p><p>I guess what I&#039;m trying to say is, just because there aren&#039;t a lot of scientific references to something - that doesn&#039;t mean it doesn&#039;t happen. It merely means that few if any have ever written about it.</p><p><br /></p><p>And of course then there&#039;s the argument that it&#039;s not acetone reacting with the copper that sometimes causes the coins to turn weird colors. It&#039;s the acetone reacting with something else on the coin.</p><p><br /></p><p>And my answer to that argument is quite simple. It doesn&#039;t matter what the cause is, it only matters that it happens at all ! And that when you don&#039;t use acetone on copper, it never happens.[/QUOTE]</p><p><br /></p>

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