Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product
Patent
1988-08-31
1990-09-11
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Silver halide colloid tanning process, composition, or product
430223, 430512, 430517, 430615, 430955, G03C 110
Patent
active
049562630
ABSTRACT:
A silver halide photographic material capable of providing very high contrast image and having improved safelight safety is described, which comprises a support having thereon at least one silver halide emulsion layer, and containing in the silver halide emulsion layer or another hydrophilic colloid layer (i) a compound represented by formula (I) ##STR1## wherein PWR represents a group capable of releasing ##STR2## upon being reduced; Time represents a group capable of releasing LA after being released from PWR, t is 0 or 1; and LA represents a group having an absorption maximum in the wavelength region longer than 310 nm, (ii) a hydrazine derivative, and (iii) at least one compound represented by formulae (IX) and (X) ##STR3## wherein R.sup.91, R.sup.92, R.sup.93, and R.sup.94, which may be the same or different, each represents hydrogen, an alkyl group, an aryl group, an amino group, a hydroxyl group, an alkoxy group, an alkylthio group, a carbamoyl group, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group or a heterocyclic group and R.sup.91 and R.sup.92 or R.sup.92 and R.sup.93 may be linked to form a 5- or 6-membered ring; provided that at least one of R.sup.91 and R.sup.93 represents a hydroxyl group.
REFERENCES:
patent: 4332878 (1982-06-01), Akimura et al.
patent: 4740453 (1988-04-01), Nakamura et al.
patent: 4783396 (1988-11-01), Nakamura et al.
Patent Abstracts of Japan, vol. 10, No. 206 (P-478)[2262], Jul. 18, 1986, abstracting JP-A-61 47 953 (Konishiroku Photo Ind. Co., Ltd.), 08-03-1986.
Inoue Nobuaki
Ishigaki Kunio
Katoh Kazunobu
Okada Hisashi
Takagi Yoshihiro
Baxter Janet C.
Fuji Photo Film Co. , Ltd.
Michl Paul R.
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