Is Metallized DuraLar™ archival? No. There are three aspects that go into determining whether a polyester film is actually archival grade: 1- whether it is pH neutral, 2- whether or not the film will impact what it comes in contact with, and 3- whether it can be sonically welded to itself. Metallized DuraLar is a pH neutral polyester film that will not stick or transfer to other surfaces. However, metallized DuraLar is not treated so that it may be sonically welded to itself, and its aluminum metal coating will oxidize over time.
How will you be using this film in an archival application? If you need a good archival grade film, try our Archival Duralar™ product line, which meets the Library of Congress’ specifications for archival polyester film.