Silver halide photographic emulsion

Details Silver halide photographic emulsion Silver halide photographic emulsion

1990-04-23

1993-03-30

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430585, G03C 118

Patent

active

051983320

ABSTRACT:
A silver halide photographic emulsion which contains at least one of the compounds represented by the following general formula (I) each having a maximum value of spectral sensitivity in a wavelength of 520 nm or more and less than 545 nm, as a sensitizing dye. ##STR1## wherein R.sub.0 and R.sub.1 may be the same or different, and represent hydrogen atoms, unsubstituted or substituted alkyl groups, unsubstituted or substituted aryl groups, unsubstituted or substituted alkoxy groups, unsubstituted or substituted aryloxy groups, halogen atoms, unsubstituted or substituted alkoxycarbonyl groups, unsubstituted or substituted acylamino groups, unsubstituted or substituted acyl groups, cyano groups, unsubstituted or substituted carbamoyl groups, unsubstituted or substituted sulfamoyl groups, carboxyl groups, or unsubstituted or substituted acyloxy groups, provided that R.sub.0 and R.sub.1 do not represent hydrogen atoms at the same time; R.sub.2 represents a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group; R.sub.3 represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted alkoxy group, an unsubstituted or substituted aryloxy group, an unsubstituted or substituted acyl group, an unsubstituted or substituted acyloxy group, an unsubstituted or substituted alkoxycarbonyl, or an unsubstituted or substituted acylamino group, and furthermore B is a substituent having such L and B that S value is 544 or less in the equation of S=3.536L-2.661B+535.4 wherein L represents a parameter of STERIMOL, and B represents the smaller value among B.sub.1 +B.sub.3 which are parameters of STERIMOL, provided that R.sub.0 and R.sub.3, or R.sub.1 and R.sub.3 do not represent unsubstituted or substituted aryl groups at the same time; R.sub.4 and R.sub.5 may be the same or different and represent unsubstituted or substituted alkyl groups; X represents a counter anion; and n is 0 or 1, and when an inner salt is formed, n is 0.
Stability in preservation after application is improved.

REFERENCES:
patent: 2521705 (1950-09-01), Firestine
patent: 2521959 (1950-09-01), Anish
patent: 4362813 (1982-12-01), Mihara et al.
patent: 4705744 (1987-11-01), Sasaki et al.
patent: 4889796 (1989-12-01), Ikegawa et al.
patent: 4965181 (1990-10-01), Kubodera et al.
patent: 4970141 (1990-11-01), Ikegawa et al.
Sasaki et al., "Color Reproduction of Fujicolor Reala", Nihan Shashin Gakkai Shi, vol. 52, pp. 41-48 (1989).
Ctein, "Fuji Reala: A New Color Neg. Choice for Pros", Photomethods, pp. 17-19 (1989).

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