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<p>[QUOTE=&quot;BCW Supplies, post: 765952, member: 22227&quot;]<b>PVC – Polyvinyl chloride</b></p><p><br /></p><p><font size="3"><font face="Times New Roman">PVC – <b>Polyvinyl chloride</b>, (IUPAC <b>Poly(chloroethanediyl)</b>) commonly abbreviated <b>PVC</b>, is a thermoplastic polymer. It is a vinyl polymer consisting of vinyl groups (ethenyls) that are bound to chlorine.</font></font></p><p><br /></p><p><font size="3"><font face="Times New Roman">Polyvinyl chloride is the third most widely produced plastic, after polypropylene and polyethylene.<a href="http://en.wikipedia.org/wiki/Polyvinyl_chloride#cite_note-2#cite_note-2" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/Polyvinyl_chloride#cite_note-2#cite_note-2" rel="nofollow"></a> Over 50% of PVC manufactured is used in construction, because it is cheap, durable, and easy to assemble. PVC production is expected to exceed 40 million tons by 2016.</font></font></p><p><br /></p><p><font size="3"><font face="Times New Roman">It can be made softer and more flexible by the addition of plasticizers, the most widely used being phthalates. In this form, it is used in clothing and upholstery, and to make flexible hoses and tubing, flooring, to roofing membranes, and electrical cable insulation. It is also commonly used in figurines and in inflatable products such as waterbeds, pool toys, and inflatable structures.</font></font></p><p><br /></p><p><font size="3"><font face="Times New Roman">All vinyl products either pages or flips contain some type of plasticizers from all/any manufacturers.&nbsp; You cannot have a page or flip that does not have a plasticizer.&nbsp; You should never have a coin in direct contact with plasticizes vinyl for any extended period of time (a couple of weeks).&nbsp; Plasticizers will over time migrate from the vinyl.&nbsp; Vinyl pages would not affect coins in a plastic snap or plastic slab.</font></font></p><p><br /></p><p><font size="3"><font face="Times New Roman">There are 2 basic type of plasticizers DEHP and BBzP, Lead can also be used as a slip agent in manufacture of soft vinyl.&nbsp; This is why you should always use a paper flip.&nbsp; The plasticizers will migrate onto the exterior of the paper flip, but will not migrate through the paper flip.&nbsp; BCW only uses BBzP for a plasticizer, and all our pages and vinyl flips are lead free.&nbsp; Lead is what will cause the dark toning of coins.</font></font></p><p><br /></p><p><font size="3"><font face="Times New Roman">Sorry for the long answer, but as you can see there is a little more than a yes or no to questions.</font></font></p><p>&nbsp;</p><p>Dana Kellum[/QUOTE]</p><p><br /></p>

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