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<p>[QUOTE=&quot;Darkwing Manor, post: 4390325, member: 738&quot;]Any visible light at all is eventually going to react with materials. As you are aware, direct sunlight is brutal and swift and is to be avoided. Ideal conditions are in total darkness, constant temp, low humidity and enclosed in acid-free, non-reactive type archival materials. Not all plastic bags are safe and may off-gas. Open air has chemicals that can off-gas and react with photographs and paper. Even the albums themselves, which were often very acidic, can affect the materials stored inside of them, particularly celluloid.&nbsp; It must also be monitored for signs of celluloid disease. Even human breath will interact with materials. Having said that, is the value of displaying these worth the accelerated exposure they will receive if left in less than ideal conditions? Are you removing them from the original albums, or are they staying in situ? Would the educational value or convenience of accessibility be as well served by using facsimiles and keeping the originals in deep archival storage? These are all the questions and trade-offs that curators face when it comes to exhibiting materials. It&#039;s a delicate balance![/QUOTE]</p><p><br /></p>

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