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<p>[QUOTE=&quot;desertgem, post: 3571190, member: 15199&quot;]Just don&#039;t get confused. PVC as a man made substance itself doesn&#039;t cause problem, it because the coin world wants &#039;transparency&#039; and &#039;flexible&#039; storage and to do that chemicals called plasticizers&nbsp; have to be added, they can break down over time with moisture and heat to acid products and migrates to metal coins and cause problems. Many coin dealers ship coins in PVC flips for safety ( they don&#039;t scratch as much as stiff mylar in shipping movement) with a note to switch out when you receive the coin.</p><p>If you live in a desert like me, PVC has never caused me problems, but I have received coins I have bought that needed to be cleaned. If you have PVC sheets in an album, and they are stiff and hard, they probably gassed out a long time ago, but probably is still a good idea for a quick dip in acetone. If you were gloves , use latex and not nitrile, as nitrile is more soluble in acetone.&nbsp;&nbsp; Jim[/QUOTE]</p><p><br /></p>

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