Hello All, We were recently fortunate enough to fund the purchase of a polyester sealer for use in encapsulating maps. Previously we would encapsulate the maps and use double-sided tape to seal the edges, leaving some gaps in the sealed edges. I'm wondering if there are best practices out there for using the polyester sealing machine -- for example, using a folded piece of mylar polyester, do you seal all three open edges or just two? Any other best practices thoughts would be useful as well... Best Regards, Ryan Mattke -- Ryan Mattke Head, John R. Borchert Map Library University of Minnesota S-76 Wilson Library 309 19th Ave South Minneapolis, MN 55455 Phone: 612.624.5757 Email: [log in to unmask] Web: http://www.lib.umn.edu/borchert <https://www.lib.umn.edu/borchert>