Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1996-09-20

1998-02-10

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430351, 430380, 430442, 430467, 430566, G03C 142, G03C 1498, G03C 7413

Patent

active

057167729

ABSTRACT:
Provided is a silver halide photographic material excellent in discrimination, which comprises on a support at least one compound represented by formula (1): ##STR1## wherein R.sub.1 to R.sub.4 each represents a hydrogen atom or a substituent, with the proviso that the sum of the Hammett substituent constants .sigma..sub.p values of R.sub.1 to R.sub.4 is 0 or more; and R.sub.5 to R.sub.9 each represents a hydrogen atom or a substituent and at least one of R.sub.5 and R.sub.9 is a substituent, wherein R.sub.1 and R.sub.2, R.sub.5 and R.sub.6, R.sub.6 and R.sub.7, R.sub.7 and R.sub.8, or R.sub.8 and R.sub.9 may combine with each other to form a ring.

REFERENCES:
patent: 3737316 (1973-06-01), Salminen et al.
patent: 3801321 (1974-04-01), Evans et al.
patent: 4021240 (1977-05-01), Cerquone et al.
patent: 4430415 (1984-02-01), Aono et al.
patent: 4447523 (1984-05-01), Ross et al.
patent: 4463079 (1984-07-01), Naito et al.
patent: 4952474 (1990-08-01), Tsukahara et al.

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