Message:

<p>[QUOTE=&quot;desertgem, post: 872862, member: 15199&quot;]Mike, Welcome to the forum. </p><p>PVC ( nonplasticized) does not sweat. Plasticized PVC does. It has migration of the plasticizers to the surface where it can leave the polymerized structure of the PVC matrix (sweat?). PVC coin flips where high migration rate plasticizers such as <font face="Arial">Phthalates were used does have migration which can initiate the coin damage. It is difficult to find documentation on plasticizer migration data in flexible membranes, but&nbsp; but here is one source concerning PVC membranes that is quite similar to the PVC Flips, except it has no concern with transparency. </font></p><p><font face="Arial"><br /></font></p><p><font face="Arial"></font><a href="http://www.geocheminc.com/pvcfaqplasticizers1.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.geocheminc.com/pvcfaqplasticizers1.htm" rel="nofollow">http://www.geocheminc.com/pvcfaqplasticizers1.htm</a></p><p><br /></p><p>You can see that the loss of plasticizer from the PVC is highest in the first 5 years and then stabilizes. The smell from new Plasticized PVC is from the plasticizers, not from the PVC. </p><p><br /></p><p style="text-align: left"><span style="color: #000000">Some of the newer PVC coin flips do not use high migration plasticizers, and as such imply they are safer, but can not use the word archival.</span></p> <p style="text-align: left"><span style="color: #000000"><br /></span></p> <p style="text-align: left"><span style="color: #000000">Jim</span></p> <p style="text-align: left"><span style="color: #000000"><br /></span></p><p>[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in