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<p>[QUOTE=&quot;desertgem, post: 1504959, member: 15199&quot;]<p style="text-align: left"><span style="color: #000000"></span></p> <p style="text-align: left"><span style="color: #000000"><br /></span></p><p>Collectors of Ancients may have a difference opinion, but </p><p><br /></p><p>Verdigris is a corrosion process generally initiated by environmental factors. PVC damage is a corrosion process initiated by the chemical plasticizers from flexible polyvinylchroide film. There is a short period of time between exposure and corrosion occurring during which the PVC can be removed with pure acetone and the coin will suffer no damage.[/QUOTE]</p><p><br /></p>

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