Silver halide photographic material and method for developing th

Details Silver halide photographic material and method for developing th Silver halide photographic material and method for developing th

1992-04-30

1994-02-22

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430401, 430416, 430510, 430523, 430586, 430600, 430944, 430963, G03C 102

Patent

active

052886042

ABSTRACT:
A silver halide photographic material is disclosed, comprising at least one sensitizing dye represented by formula (I): ##STR1## wherein V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5 and V.sub.6 each represents a substituent with the total of the Hammett's constants of all the substituents being less than -0.27, R.sub.1 and R.sub.2 each represents an alkyl group, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6 and L.sub.7 each represents a methine group, m represents 0 or 1, Z represents an atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing hetero ring, X.sub.n represents a charge balancing counter ion(s), n has a value of at least 0 which is necessary for neutralizing the charge of the compound. The material has a high sensitivity to infrared rays and gives an image of high quality with little remaining color. Also disclosed is a method for processing such a silver halide photographic material.

REFERENCES:
patent: 3647460 (1972-03-01), Hofman et al.
patent: 4536473 (1985-08-01), Mihara
patent: 5153112 (1992-10-01), Yoshida et al.

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