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He matted and framed blotter sheets he had collected, sometimes obtaining undipped, LSD-free sheets from acid dealers. [18] He exhibited his collection in the mid-1980s and in 1987 won second place at the San Francisco County Fair for his exhibition, which was described as "unusual but timely". [4] His collection includes over 33,000 sheets of ...
Preservation of documents, pictures, recordings, digital content, etc., is a major aspect of archival science. It is also an important consideration for people who are creating time capsules, family history, historical documents, scrapbooks and family trees. Common storage media are not permanent, and there are few reliable methods of ...
A conservation technician examining an artwork under a microscope at the Indianapolis Museum of Art. The conservation and restoration of books, manuscripts, documents, and ephemera is an activity dedicated to extending the life of items of historical and personal value made primarily from paper, parchment, and leather.
The company Hercules Incorporated developed the first alkaline sizing in the 1950s that made acid-free paper possible. [10] Despite the advances in paper making and the identification of and concern around the brittle book problem, it took decades before the adoption of ANSI NISO Standard Z39.48-1984 - Permanence of Paper for Publications and Documents in Libraries in 1984.
All materials should be acid-free for conservation. The depth of the box is normally about five inches, if it is not made for a specific object, and various standard sizes are made, with traditional names including "royal", "imperial", "elephant" and others. Ones for very old books will typically be custom made to an exact size.
In most climates it is often better to have a vapor-open building assembly, meaning that walls and roofs should be designed to dry: [6] either to the inside, the outside, or both, so the ventilation of water vapor should be taken into consideration. A vapor barrier on the warm side of the envelope must be combined with a venting path on the ...
Housewrap (or house wrap), also known by the genericized trademark homewrap (or home wrap), generally denotes a modern synthetic material used to protect buildings. Housewrap functions as a weather-resistant barrier , preventing rain or other forms of moisture from getting into the wall assembly while allowing water vapor to pass to the exterior.
Acidic paper is paper which was manufactured using acidic substances. [1] Widely used since the mid-nineteenth century, its pages become yellow within years, extremely brittle over decades, and eventually unreadable in the library and archive collections intended to preserve them. [2]
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