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<p>[QUOTE=&quot;GDJMSP, post: 3061108, member: 112&quot;]I don&#039;t think so. I don&#039;t think it has anything to do with the rubber band being a rubber band. I think rubber bands are simply the thing commonly used.</p><p><br /></p><p>In other words, I believe that you could take a piece of string, or even thread, or anything else, and tie it around the flip. Leave it for whatever time it takes, and the very same dark band around the coin will appear on the coin - just like it does with the rubber band.</p><p><br /></p><p>What I&#039;m trying to get across is that it is my belief that it is the touching, and or the very close proximity, of the flip in conjunction with air flow, and the rest of the flip not being that close or touching, that causes the dark band toning we commonly see.</p><p><br /></p><p>I&#039;m saying this because I have seen, and seen it a lot, very similar things happen when all different kinds of plastic come into very close proximity and or touch other objects, and is left there for a period of time, even walls. Dark spots, areas, and or bands form on the objects wherever that close proximity occurs - but only there.</p><p><br /></p><p>My thinking is that it caused by some sort of static discharge between the plastic and the coin creating an electrical attractant that is drawing the contaminants out of the air and causing the dark toning to appear.</p><p><br /></p><p>I think I&#039;ll find a nice new penny with thread or string around the flip and try the experiment myself.[/QUOTE]</p><p><br /></p>

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