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<p>[QUOTE=&quot;2manybooks, post: 9466732, member: 8267&quot;]When you spoke with Gaylord did you speak with a customer representative, or someone with technical expertise? You will be asking them questions that they</p><p>don&#039;t usually have to respond to, except perhaps from conservators.</p><p><br /></p><p>You would need to contact the various suppliers, and ask to speak with someone who can tell you if their polypropylene containers have been tested for VOCs (volatile organic compounds) that might affect enclosed artifacts, using &quot;Oddy&quot; tests or other analytical methods.</p><p><br /></p><p>Here is an abstract for an article that may be a good introduction to the subject, and can arm you with useful terms and understanding (the full article does not appear to be available online without paying. You may be able to obtain a copy of the journal issue through a library.) -</p><p><a href="https://www.tandfonline.com/doi/epdf/10.1080/01410096.2000.9995149?needAccess=true" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.tandfonline.com/doi/epdf/10.1080/01410096.2000.9995149?needAccess=true" rel="nofollow">https://www.tandfonline.com/doi/epdf/10.1080/01410096.2000.9995149?needAccess=true</a></p><p><br /></p><p>&quot;Oddy&quot; tests have become a standard in conservation, named after their originator, Andrew Oddy.</p><p><a href="https://www.conservation-wiki.com/wiki/Oddy_Test#History" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.conservation-wiki.com/wiki/Oddy_Test#History" rel="nofollow">https://www.conservation-wiki.com/wiki/Oddy_Test#History</a></p><p><br /></p><p>My comments here have been in the vein of general warnings, based on my previous training in conservation. I have been out of the field for awhile now, and cannot speak to the practices of any specific suppliers. But I feel confident in saying that not all polypropylene is created equal because of the issue of varying additives (even in small amounts). And you have a better chance of avoiding unexpected problems by buying from conservation suppliers.[/QUOTE]</p><p><br /></p>

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