The Industry Standard
The preservation industry considers Biaxially Oriented Polyester films (aka BoPET or Mylar) as the preferred method to store and display valuable documents, photographs, currency, stamps, comic books and other collectible artifacts. Many still refer to BoPET as Mylar which is a trade name owned by DuPont. DuPont discontinued using the trade name Mylar years ago and now produces 2 equivalent films using the trade name Melinex.

LOC Approved
The US Library of Congress has approved only a few versions of BoPET for storage of artifacts (DuPont Melinex 516 & 456 and SKC SH72S). Museums, Universities and collectors worldwide consider the Library of Congress endorsement as the gold standard for preservation.

What makes Mylar the conservtion film of choice?
BoPET properties which make it the best choice for preservation include high tensile strength, is an adequate barrier to gases and aroma and has outstanding visual transparency. The approved films do not have surface coatings and will not react with inks or paper ingredients. The film is completely inert, is acid free and has no plasticizers.

Learn more about how BCW produces Mylar sleeves and pouches.