Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1984-01-30
1985-11-19
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430564, 430600, 430611, 430379, 430504, 430505, 430407, 430508, G03C 176
Patent
active
045542457
ABSTRACT:
A color reversal photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer, an organic compound and colloid grains of a metal or metal sulfide or silver halide grains the surface of which is previously fogged. The silver halide emulsion layer includes fine grains of silver halide particles having a particle size of 0.3.mu. or less. The fine grain particles are present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver halide grains in the emulsion. The silver halide emulsion also includes coarse grains having a particle size of more than 0.3.mu.. The organic compound has a solubility product constant of 10.sup.-14 or less when forming a salt with a silver ion. By utilizing the organic compound in combination with the particular fine grain silver halide particles it is possible to obtain a material which has improved tone reproduction properties in high exposure areas and also provide a material with a wide exposure lattitude.
REFERENCES:
patent: 3779764 (1973-12-01), Moll et al.
patent: 3846133 (1974-11-01), Zorn et al.
patent: 3888676 (1975-06-01), Evans
patent: 3945829 (1976-03-01), Zorn et al.
patent: 3989527 (1976-11-01), Locker
patent: 4082553 (1978-04-01), Groet
patent: 4088494 (1978-05-01), Tani
Deguchi Naoyasu
Goda Kensuke
Hasebe Kazunori
Hayashi Yasuhiro
Yamagami Hiroyuki
Fuji Photo Film Co. , Ltd.
Louie Won H.
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