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<p>[QUOTE=&quot;Just Carl, post: 125911, member: 4552&quot;]Oddly enough I am a chemist. I was a associate professor at a local Junior College in Chemistry. I have degrees in chem as well as electrical engineering. I have an extensive library of chem books, some evendating back to the 20&#039;s. Therefore the interest is in not what PVC is or what it can do but where is it stipulated that the plastic in 2x2&#039;s or the slides in albums are composed of a specific substance. </p><p>I also agree with satootoko to let sleeping dogs lie.[/QUOTE]</p><p><br /></p>

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