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<p>[QUOTE=&quot;physics-fan3.14, post: 3279849, member: 19165&quot;]PVC has a very distinctive smell. If you have a shower curtain, it is probably vinyl. Imagine that scent - now smell your flips. If it smells like a shower curtain, its PVC. </p><p><br /></p><p>PVC will also be far more flexible than archival flips. They may feel a little greasy, as well, depending on how old they are. </p><p><br /></p><p><br /></p><p><br /></p><p>I cannot think of a single reason to keep any vinyl flips. If you are sure they are vinyl, I&#039;d chuck them in the garbage.[/QUOTE]</p><p><br /></p>

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