Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1986-09-22

1988-08-09

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430949, 430606, 430267, G03C 136

Patent

active

047627697

ABSTRACT:
A silver halide photographic material which has at least one silver halide emulsion layer comprising silver chloride or silver chlorobromide grains which has a bromide content of 5 mol % or less, and containing a rhodium salt in an amount of from 1.times.10.sup.-6 to 5.times.10.sup.-4 mole per mole of silver in said layer, and contains both a hydrazine derivative and a dye having an absorption peak in the wavelength region of from 400 nm to 550 nm in at least one of said emulsion layer another hydrophilic colloid layer, to thereby control the ratio of sensitivity at 360 nm to sensitivity at 400 nm (S.sub.360 /S.sub.400 ratio) to not less than 30, thereby achieving ultra-high contrast, high sensitivity, and a satisfactory aptitude for safelight.

REFERENCES:
patent: 2274782 (1942-03-01), Gaspar
patent: 2956879 (1960-10-01), Van Campen
patent: 3718472 (1973-02-01), Oliver et al.
patent: 4452882 (1984-06-01), Akimura et al.
patent: 4681836 (1987-07-01), Inoue et al.
Patent Abstracts of Japan, vol. 9, No. 58 (P-341) (1781), Mar. 1985, "Image-Forming Method", to Haniyu; JPA 59-192447, Published: Mar. 8, 1986.
Patent Abstracts of Japan, vol. 10, No. 206 (P-478) (2292), Jul. 1986, "Photosensitive Silver Halide Material for Daylight Room", to Mihara; JPA 61-47949, Published: Nov. 2, 1984.

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