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<p>[QUOTE="GDJMSP, post: 2375582, member: 112"]You guys are the chemists so you know far more than me. But what I know is that verdigris, or at least what we non-chemists call verdigris, forms not only on copper coins but on silver, gold, and clad coins too. Does it form as often as it does on copper ? No, no where near that, but it does form. </p><p><br /></p><p>And yeah, I figured the cardboard could be playing a part in the unusual color, as well as playing a part in accelerated growth causing the "green" to spill over from the coin onto the cardboard itself.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 2375582, member: 112"]You guys are the chemists so you know far more than me. But what I know is that verdigris, or at least what we non-chemists call verdigris, forms not only on copper coins but on silver, gold, and clad coins too. Does it form as often as it does on copper ? No, no where near that, but it does form. And yeah, I figured the cardboard could be playing a part in the unusual color, as well as playing a part in accelerated growth causing the "green" to spill over from the coin onto the cardboard itself.[/QUOTE]
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