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
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