Ginger- I recently participated in an experiment with how items and storage materials burn. A piece of Tyvek was draped over some of the "artifacts." When the room was set on fire, the tyvek didn't seem to be all that fire retardent- in fact, it burned and left strange little tyvek bubbles that were not removable, on the artifacts. Plus, we found a strange, unidentifyable material between the artifact and tyvek. It could have been created from the tyvek during the burn. No one knew what it was or how it got there- including the person who set up the burn room. I thought I'd pass that info along. Arlyn Danielson ---------- From: Ginger M. Young[SMTP:[log in to unmask]] Sent: Tuesday, June 23, 1998 7:00 PM To: [log in to unmask] Subject: Re: polyethylene sheeting i believe it can also trap moisture. i have worked for a museum that has used Tyvek to drape over open shelving, etc. as a protective barrier against light and dust. Tyvek is also fire retardent...