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<p>[QUOTE=&quot;desertgem, post: 671921, member: 15199&quot;]The factors most often cited as strong initiators of PVC plasticizer immigration to coins are </p><p>-heat ( especially any over 85 F)</p><p>-humidity ( especially over 50 %)</p><p>-direct sun light ( more tropical areas)</p><p>-the pre-existing patina already on the coin&#039;s surface. ( difficult to evaluate)</p><p><br /></p><p>If you live in Hawaii , and just put a BU 2009 cent into a PVC flip, ....look at it in a year.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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