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ANSI/I3A IT2.4-1987 (R1994)

ANSI/I3A IT2.4-1987 (R1994)

Photography - Sensitometry of Screen/Film Systems for Medical Radiography - Part 1: Determination of Sensitometric Curve Shape, Speed and Average Gradient (same as ANSI/ISO 9236-1-1996) International Imaging Industry Association / 17-Apr-1997

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IS0 was requested to develop a method for measuring speedand average gradient of black-and-white negative camera filmprocesscombinations used in aerial photography because ofthe incompatability of various existing standards; the aim beingto create an International Standard that would incorporate themost important features of these standards.



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