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<p>[QUOTE=&quot;Kevin Mader, post: 5365008, member: 106826&quot;]I believe that what causes the discoloration to the coin is the out gassing/leaching of the plasticizers in PVC.&nbsp; To make PVC as flexible, plasticizers are added.&nbsp; PET(E) does not get the plasticizer therefor remains more rigid.&nbsp; This is why the Medical Device world moved away from PVC, since you don&#039;t want what is leached entering your body (cannula and other medical tubing used it).&nbsp; And it is harmful to coins.[/QUOTE]</p><p><br /></p>

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