National Archives,Washington,DC,District of Columbia,Harris & Ewing,1939,8

Title: National Archives. Washington, D.C., Nov. 22. Preservation of documents has long been a problem in libraries and offices of record. It was once done by a process known as 'crepelining,' which consisted in placing coarsely woven silk over and under the paper to be preserved with the use of adhesive. The most modern process now used is called the laminating process and consists in sandwiching the document between two sheets of thin, transparent cellulose acetate. This is then placed between two highly polished metal plates and subjected to heat and pressure in a hydraulic press
Creator(s): Harris & Ewing, photographer
Date Created/Published: [19]39 November 22.
Notes:
Title from unverified caption data received with the Harris & Ewing Collection.
Gift; Harris & Ewing, Inc. 1955.
General information about the Harris & Ewing Collection is available at http://hdl.loc.gov/loc.pnp/pp.hec
Temp. note: Batch five.
Subjects:
United States--District of Columbia--Washington (D.C.).
Glass negatives.
Bookmark /hec2009014400/
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