Connie, I noticed you asked about plastic storage containers, and if you’re looking into polypropylene or polyethylene, these can be a good option, especially for a space with wide RH fluctuations. The Image Permanence Institute did an interesting study showing that the microenvironments within plastic containers took much longer to equilibrate to the outside environment than did the microenvironments within archival boxes. Our blog has a discussion of pros and cons of plastic boxes that you might find helpful and contains a link to IPI’s study. (http://collectionsconversations.wordpress.com/2012/01/27/pros-and-cons-of-plastic-storage-containers/)
