Bibframe Instance
TitleNational 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 pressNotePhysical details: glass Applies To: Applies To: all Title from unverified caption data received with the Harris & Ewing CollectionGeneral information about the Harris & Ewing Collection is available atCould not render: bf:electronicLocatorDimensions4 x 5 in. or smallerExtent1 negativeProvision ActivityPublication: United States 1939 Publication: [19]39 November 22 CarriersheetCould not render: bf:code Usage And Access PolicyNo known restrictions on publication. For more information, see Harris & Ewing Photographs - Rights and Restrictions InformationCould not render: bf:electronicLocatorAcquisition SourceDLC Stock Number:LC-DIG-hec-27702 (digital file from original negative) 