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<p>[QUOTE="Flyliner, post: 8020179, member: 28965"]I am in a high humidity environment as well which is why the thread. According to this below that was posted on this site a while ago, PET isn't the best for moisture barrier, polypropylene is better. Hence the search for the bags. LDPE (Ziplocs) can work till I find better I guess.</p><p><br /></p><p><i>"I'm not sure there is such a thing as archival polypropylene or polyethylene."</i> - I guess what I mean is the polypropylene used for <a href="https://www.coinsupplyexpress.com/2x2-pocket-pages" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.coinsupplyexpress.com/2x2-pocket-pages" rel="nofollow">coin pages like this</a>. Something I can trust has no additives.</p><p><br /></p><p>[ATTACH=full]1390444[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="Flyliner, post: 8020179, member: 28965"]I am in a high humidity environment as well which is why the thread. According to this below that was posted on this site a while ago, PET isn't the best for moisture barrier, polypropylene is better. Hence the search for the bags. LDPE (Ziplocs) can work till I find better I guess. [I]"I'm not sure there is such a thing as archival polypropylene or polyethylene."[/I] - I guess what I mean is the polypropylene used for [URL='https://www.coinsupplyexpress.com/2x2-pocket-pages']coin pages like this[/URL]. Something I can trust has no additives. [ATTACH=full]1390444[/ATTACH][/QUOTE]
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