Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1981-10-30
1983-08-30
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430603, 430604, 430605, 430607, 430940, G03C 128, G03C 134
Patent
active
044017545
ABSTRACT:
A silver halide photographic emulsion characterized in that it comprises silver halide grains which are reduction-sensitized during the process of growing said grains and containing a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an acyl group and a cycloalkyl group and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an acyl group, a carboxyl group, an aldehyde group, an amino group, a sulfo group, an alkylthio group, an acylamino group, an aryloxy group, an arylthio group, an alkylamino group, an alkoxycabonyl group and a sulfonamide group. The emulsion exhibits both high sensitivity and improved stability as compared with prior art compositions.
REFERENCES:
patent: 3915715 (1975-10-01), Millikan et al.
patent: 4175968 (1979-11-01), Credner et al.
patent: 4252893 (1981-02-01), Iwamuro et al.
patent: 4268621 (1981-05-01), Ogi et al.
patent: 4299909 (1981-11-01), Imatomi et al.
Koitabashi Takeo
Shiozawa Hiroaki
Suzuki Akio
Takiguchi Hideki
Bierman Jordan B.
Bierman Linda
Brown J. Travis
Konishiroku Photo Industry Co,., Ltd.
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