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<p>[QUOTE=&quot;jaytant, post: 173903, member: 6902&quot;]Fake leather is what is called PVC- polyvinyl chloride (with some softening agents included- these cause the typical smell you get from transparent vinyl sheets and can sometimes help you tell that you have PVC involved in the situation). The 90% silver coins, DO contain 10% copper (I guess you are talking about the 1932-64 Quarters), and this copper leaches some of the chlorine to form CupricChloride (which happens to be green). This is especially the case if the material was kept in warm conditions. Any whitish/grey/black residue formed would be Silver Chloride.</p><p>The sad part is, since the coin material itself is part of the haze, the coin surface has already been damaged, even though the haze is not too terribly difficult to get off.[/QUOTE]</p><p><br /></p>

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