Light-sensitive silver halide photographic material image qualit

Details Light-sensitive silver halide photographic material image qualit Light-sensitive silver halide photographic material image qualit

1992-06-19

1993-12-07

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Luminescent imaging

430567, 430966, 430502, 430508, 430509, G03C 516

Patent

active

052682510

ABSTRACT:
A light sensitive silver halide photographic material for the use of X-ray photography, wherein the effective contrast characteristics of the photographic material can be changed as required for the type image being exposed, as a function of the number and disposition of fluorescent intensifying screens. The photographic material has a support carrying first and second emulsion layers on each side thereof. The first layer has a maximum density and sensitivity higher than that of the second layer; the second layer has a density of not more than 0.2 when exposed from the side of the first layer with sufficient irradiation to give the first layer a density of 1.0; and the slope connecting two points corresponding to densities of 0.8 and 1.3 above the fog or baseline on a characteristic curve of the first layer is more than the slope of a line connecting two points of 0.3 and 0.5 above the fog or baseline on a characteristic curve of the second layer.

REFERENCES:
patent: 4801526 (1989-01-01), Yoshida et al.
patent: 4994355 (1991-02-01), Dickerson et al.
patent: 4997750 (1991-05-01), Dickerson et al.
patent: 5021327 (1991-06-01), Bunch et al.
patent: 5108881 (1992-04-01), Dickerson et al.

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