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<p>[QUOTE=&quot;Kentucky, post: 2208719, member: 33176&quot;]Even though Doug (GDRMSP) doesn&#039;t agree, a test that works to distinguish between PVC and Polyester (Mylar) is to heat up a copper wire in a flame, touch it hot to a corner of the flip (you&#039;ll probably ruin the flip) until some of the material melts on the wire, and then return the wire to a flame and look for a green color (indicating a halogen - chlorine).&nbsp; The PVC is objectionable because of added materials (plasticizers) which can leech out and mess the coin up, and it will give off HCl (gas from hydrochloric acid) as it decomposes.&nbsp; (Thank goodness for parenthesis)[/QUOTE]</p><p><br /></p>

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