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About this collection

Using funds provided by the Carnegie Foundation, National Bureau of Standards (NBS) scientists researched the permanence of Government writing papers, the preservation of records, and of library storage conditions. Light, heat, humidity, and many other deterioratives of papers and books were assessed, but the principal enemy of records proved to be the common air pollutant, sulphur dioxide. The investigation, extended to newspaper records, motion picture film, records on photographic film, microfilm, and lamination, culminated in NBS's work on the preservation at the National Archives of the originals of the Declaration of Independence and the Constitution of the United States (see Charters of Freedom Photographic Collection). [From: Measures for Progress by Rexmond C. Cochrane, p.334-335]

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