Abstract
The types of film we use for the registration of X-ray microscopical images can be divided roughly into three classes:
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a)
Special, coarse-grained X-ray film, which is exclusively used for recording hard X-rays. (Anode voltage more than 40 kV) Its characteristic features are: high sensitivity and large grains.
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b)
Normal fine grain film, preferably unsensitised. This is the film used amongst other things for recording electron images, and for making transparencies. Specific features are good contrast and relatively small grains; the sensitivity is considerably lower than a).
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c)
Ultra fine grain film of the Lippmann type, with submicroscopical grains ( ≈ 500 Å). Up till now this class of film is the only one which can be used for high resolution contact microradiography.
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Poen, O.S. (1946). Film Materials. In: Microprojection with X-Rays. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-6782-8_4
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