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<p>[QUOTE=&quot;Kentucky, post: 1659068, member: 33176&quot;]PVC is PolyVinylChloride and is one of the most used plastics in the world.&nbsp; There are two problems with PVC.&nbsp; Pure PVC is a hard and brittle material (water pipes type stuff) but if a lot of a very high boiling material is infused into it (plasticized) it can become soft and pliable for use in lawn chair webbing and cheap plastic film.&nbsp; The problems with PVC are that the plasticizer chemical can exude out and do bad stuff or that the PVC itself can degrade and give off hydrogen chloride gas.&nbsp; When hydrogen chloride gas mixes with water, we call it hydrochloric acid, not too good for most coins.&nbsp; </p><p><br /></p><p>To check plastic materials to see if they contain PVC, heat up a copper wire as hot as you can get it (butane lighter flame would probably work) and touch the plastic to be tested so that some of it melts and sticks to the copper.&nbsp; Now heat the wire again and watch for a green coloration to the flame that comes from copper chloride that should be formed from the interaction of copper and PVC.[/QUOTE]</p><p><br /></p>

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