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U.S. Library of Congress's Articles in Preservation and Care

  • Care, Handling, and Storage of Photographs
    Photographic materials have complex physical and chemical structures that present special preservation challenges to the librarian and archivist. Since the birth of photography in the late 1830s, many different photographic processes and materials have been utilized, each subject to deterioration through time and with use.
  • Caring for Cylinder Recordings
    Cylinder recordings, invented by Thomas Edison in 1877, were the first successful form for recording and reproducing sound. Made first of tin foil, then wax, and later celluloid, the cylinder was used until the late 1940's.
  • Cylinder, Disc and Tape Care in a Nutshell
    General Do not touch the playing surface/s of any recording.
    Clean hands before handling recordings.
  • Leather Dressing
    Leather dressings were at one time thought to be useful in extending the life of leather bindings. Experience has shown, however, that its benefit is primarily cosmetic and that the use of leather dressing by someone without professional expertise, does more harm than good.
  • Care, Handling and Storage of Motion Picture Film
    All film is subject to fading, particularly integral tri-pack color positives, such as Ektachrome® , Ansco®, or Agfa ®. As with all other materials, this fading -- as well as other chemical and physical deterioration -- are impossible to stop entirely. With proper care, handling and storage, the rate of deterioration can be slowed and the usable life of a film can be extended significantly.
  • Guide to Preservation Matting and Framing
    To increase the life and enjoyment of your print or photograph and to save money in the future on conservation treatments, you should invest in appropriate preservation matting and framing. Reviewing the following information and then interviewing the framer regarding the procedures and materials will help you decide.
  • Caring for Your Family Treasures
    Before investing time and money to improve the condition of your documents, art, photographs, memorabilia, and books, you should first assess the importance of various items to you and your family. They may be objects of monetary value, or, like photographs of grandparents or a family Bible, Torah, or Koran, they may have intrinsic, sentimental, or historical value.
  • Preservation of Scrapbooks and Albums
    Scrapbooks and albums provide a unique record of individuals, families, organizations, and associations and are, therefore, found in many museums, archives, and libraries. Although albums initially were tablets used by the Romans to record public edicts, they have become accounts accumulated over time, often private and personal, preserved on blank pages in a book format.
  • Caring for Your Photographic Collections
    Keep photographic materials at proper environmental conditions. Relative humidity is the single most important factor in preserving most photographic materials. Relative humidity levels above 60% will accelerate deterioration. Low and fluctuating humidity may also damage them.
  • Care, Handling and Storage of Books
    Damage to a book is cumulative. The repeated incorrect handling and storage of a book can quickly transform a new book into a worn or even an unusable one. Proper handling and storage in a stable, cool, clean, non-humid environment, can prolong its life.
  • Ownership Marking of Paper-Based Materials
    Indelible identification marks have traditionally been placed on paper-based materials to help deter their theft and to establish ownership in the event of theft. Some institutions and collectors do not mark their holdings for a variety of reasons. For example, ownership marks cannot guarantee that an item, or portions of it, will not be stolen.
  • The Deterioration and Preservation of Paper: Some Essential Facts
    Paper deterioration is still a problem. But, thanks to decades of scientific research -- much of it supported by libraries and archives -- this deterioration is no longer a mystery. The preservation strategy at the Library of Congress has traditionally benefitted by insights provided by science.
  • Preserving Newspapers
    Of the thousands of newspapers published in the United States each day, most eventually find their way into trash bins, under litter boxes, into bird cages, or, hopefully, into recycling containers. The perception persists that yesterday's news is no news at all. For librarians and archivists, however, that perception presents a tremendous challenge.
  • Preserving Works on Paper: Manuscripts, Drawings, Prints, Posters, Maps, Documents
    The manufacturing method and materials of works on paper, such as the inks, paints and paper components, influence the inherent, long-term stability of library, art and archival items. Providing a good environment, and safe handling and storage conditions are critical to preserving paper collections.



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