Abstract
BRITISH STANDARD SPECIFICATION 1371 : 1947 for microfilm, readers and reels has been produced in co-operation with the American Standards Association‘s Committee, and American standards about to be published will provide equivalents to B.S. 1371, so that microfilms made in Great Britain should be capable of satisfactory projection on a reader made in the Commonwealth or in the United States and vice versa. The specification covers 16 mm. and 35 mm. microfilm readers and reels for processed microfilm, each in a separate section. The first section specifies the stock to be used, dimensions, method of winding, the leader trailer and title frame, as well as the arrangement of images and correct sequence of pages for convenient reproduction. Essential dimensions for microfilm readers are specified in the next section, as well as other features for satisfactory reproduction, including the type of lens and magnification and the limiting temperature for the film in the gate, a method of measuring which is described in an appendix. Dimensions and features of reels for processed microfilm are specified in the third section. Standardization along the lines indicated in this specification and the three forthcoming American standards should materially assist the satisfactory use of microfilm and its extension to further fields.
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Standardization of Micro-film Technique. Nature 161, 346 (1948). https://doi.org/10.1038/161346b0
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DOI: https://doi.org/10.1038/161346b0