Can someone advise me if this is the case? If it's inert, I'm thinking of enclosing approximately 20 architectural drawings in Plexi, with acid-free mat board for backing and countersunk screws in the corners to hold the pieces together. The drawings were used to produce blueprints and crumble when touched, so encapsulation with Mylar doesn't look viable. Please reply to the list and not to me personally. Thanks. Casey Edward Greene Head of Special Collections Rosenberg Library 2310 Sealy Galveston, TX 77550 A posting from the Archives & Archivists LISTSERV List sponsored by the Society of American Archivists, www.archivists.org. For the terms of participation, please refer to http://www.archivists.org/listservs/arch_listserv_terms.asp. To subscribe or unsubscribe, send e-mail to [log in to unmask] In body of message: SUB ARCHIVES firstname lastname *or*: UNSUB ARCHIVES To post a message, send e-mail to [log in to unmask] Or to do *anything* (and enjoy doing it!), use the web interface at http://listserv.muohio.edu/archives/archives.html Problems? Send e-mail to Robert F Schmidt <[log in to unmask]>