There are several things to consider when purchasing a Dust Jacket Cover, also called Book Jacket Cover and Mylar Covers (although covers are not actually mylar). The Main consideration is the Type of Book Jacket Cover. The summary below highlights the differences between the two types Archival Quality and Non-Archival Quality.
Archival Quality: Can be used on ANY book and is preferred by book collectors.
The easiest way to tell the difference between Archival & Non-Archival is to look for printing on the paper Backing. If there is printing present, it's NOT archival. With Archival Quality, The paper backing, clear film and the adhesive used to fasten the film to the backing are all formulated to meet Archival Specifications.
- The paper is acid free with NO printing.
- The film is chemically stable polyester (lots of people call this Mylar in error)
- The adhesive used to bind the paper to the clear polyester is pH neutral (no migrating acids).
- There are NO sticky adhesive strips to hold the fold shut. Over time the sticky adhesive can (and does) migrate on to the Book or DJ.
- All of these combined make for a long lasting book jacket cover that will not yellow or crack, acids will not migrate to your book or DJ. Since there is no ink, there is no acid migration or ink bleeding through to your DJ or Book.
Non-Archival:
This type of cover is used extensively in libraries to cover books.
It is great for everyday books.
Paper backing is acid free but the ink is not
The Ink is not considered archival and is acidic.
The adhesive used to bind the paper backing is NOT pH neutral.
This type of Book jacket cover is great for book sellers and collectors who want to protect the Dust Jacket from wear and tear but don't need or want archival protection. It really helps protect the dust jacket from damage during shipping.
Protects from wear and tear while improving the looks of an old dust jacket
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