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<p>[QUOTE=&quot;2manybooks, post: 9465126, member: 8267&quot;]Reputable archival supply companies make an effort to work with manufacturers to insure that the materials used are of known composition and as inert as possible. They may be able to provide you with a chemical analysis of their products, if requested.</p><p><br /></p><p>Manufacturers that are not specifically focused on archival quality are under no obligation to reveal their formulations, considering it proprietary information. They may also change their formulations at any time, without notice.</p><p><br /></p><p>If you really want to get into the weeds I can recommend this website, which provides a searchable index to the conservation literature:</p><p><br /></p><p><a href="https://aata.getty.edu/primo-explore/search?vid=AATA" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://aata.getty.edu/primo-explore/search?vid=AATA" rel="nofollow">https://aata.getty.edu/primo-explore/search?vid=AATA</a>[/QUOTE]</p><p><br /></p>

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