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Polyester sleeves, acid-free folders, and pH buffered document boxes are common supportive protective enclosures whose selection must match the media's chemical and physical properties. [1] Other considerations in preserving paper/books are: Damaging light, particularly UV light, which fades and destroys media over time by breaking down the ...
Manuscripts and paper documents are often stored in protective archival-quality boxes and folders, made of acid-free and lignin-free materials. [52] Documents with heavy use may be stored or encapsulated in a clear polyester (Mylar) film sleeve or folder.
Because polyester is an inert and stable plastic, it does not possess the same deterioration concerns as celluloid films. Polyester can be stored at room temperature and does not need cold storage for preservation. Polyester is also used as an archival enclosure option for materials, such as Mylar and Melinex brand products.
Polyester sleeves and encapsulation have been praised for their ability to protect the photograph from humidity and environmental pollution, slowing the reaction between the item and the atmosphere. This is true, however the polyester just as frequently traps these elements next to the material it is intended to protect.
The conservation and restoration of photographs is the study of the physical care and treatment of photographic materials. It covers both efforts undertaken by photograph conservators, librarians, archivists, and museum curators who manage photograph collections at a variety of cultural heritage institutions, as well as steps taken to preserve collections of personal and family photographs.
It is a relatively stable archival form when properly processed and stored. Preservation standard microfilms use the silver halide process, creating silver images in hard gelatin emulsion on a polyester base. With appropriate, albeit difficult to maintain, storage conditions, this film has a life expectancy of ~500 years. [19]
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