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<p>[QUOTE=&quot;Kasia, post: 3295846, member: 31533&quot;]Here, from a website:</p><p><br /></p><p>&quot;There are two basic types of PVC flips on the market today: Plasticized (soft flips), and Unplasticized (the hard or rigid coin flips). Unplasticized flips contain lower levels of chemical softeners than soft vinyl coin flips.</p><p><br /></p><p><b><i>Make no mistake, Unplasticized, uPVC or UN flips are still PVC flips.</i></b></p><p><br /></p><p>There is a widely held misconception about this, so let&#039;s repeat: there is no such thing as a PVC free unplasticized flip. An unplasticized flip is merely a PVC flip with less plasticizer, or chemical softener. As a result, unplasticized flips not only offer more rigidity, but are considered safer for coin storage than soft vinyl. This is why some manufacturers will refer to unplasticized flips as “Safe for long term storage”, or even &quot;Archival&quot;. Ironically, unplasticized flips tend to be less popular among collectors who prefer the feel and elasticity of a soft flip. Just remember, <i>when it comes to vinyl flips, the harder and more rigid the flip, the safer it is as a storage solution for your coins.&quot;</i></p><p><i><br /></i></p><p><i>from <a href="https://www.translinesupply.com/store/pg/42-PVC-and-PET-Flips.aspx" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.translinesupply.com/store/pg/42-PVC-and-PET-Flips.aspx" rel="nofollow">https://www.translinesupply.com/store/pg/42-PVC-and-PET-Flips.aspx</a></i></p><p><i><br /></i></p><p>It also talks about PET flips which are more expensive and also have some downsides.[/QUOTE]</p><p><br /></p>

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