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<p>[QUOTE="desertgem, post: 1408949, member: 15199"]Polyester and polypropylene are safer for pages, but read the wiki pages on PVC. You have had enough chemistry in dental school to follow it. The aspect of plasticized ( with phthalates --> possible acidic outgassing) PVC is well accepted by the coin world. As a flip, the outgassed components of the plasticizers can react with moisture and the acid products "eats" corrodes your coin. Regular rigid PVC pipe ( no plasticizers ) is quite safe ( as much as anything can be today's world), and production techniques can produce flexible transparent PVC without the acidic plasticizers. I do not use plastic storage pages, as it isn't my form. When in doubt go the safest route.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 1408949, member: 15199"]Polyester and polypropylene are safer for pages, but read the wiki pages on PVC. You have had enough chemistry in dental school to follow it. The aspect of plasticized ( with phthalates --> possible acidic outgassing) PVC is well accepted by the coin world. As a flip, the outgassed components of the plasticizers can react with moisture and the acid products "eats" corrodes your coin. Regular rigid PVC pipe ( no plasticizers ) is quite safe ( as much as anything can be today's world), and production techniques can produce flexible transparent PVC without the acidic plasticizers. I do not use plastic storage pages, as it isn't my form. When in doubt go the safest route. Jim[/QUOTE]
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