Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Developing
Patent
1998-01-28
1999-03-30
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Developing
430264, 430440, 430442, 430446, G03C 529
Patent
active
058887083
ABSTRACT:
A development processing method comprising developing a silver halide photographic material with a developing solution, (i) wherein the silver halide photographic material comprises a support having thereon at least one light-sensitive silver halide emulsion layer and contains: (a) at least two kinds of light-sensitive silver halide emulsions which are each spectrally sensitized and have sensitivities different from each other with respect to a certain exposure wavelength; and (b) at least one hydrazine derivative in at least one of the silver halide emulsion layer and other hydrophilic colloidal layers, and (ii) wherein the developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5 and contains: (1) at least one ascorbic acid developing agent and (2) at least one auxiliary developing agent represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom or a substituent group; and R.sub.5 and R.sub.6, which may be the same or different, each represents an alkyl group, an aryl group, an aralkyl group or a heterocyclic group.
REFERENCES:
patent: 4746593 (1988-05-01), Kitchin et al.
patent: 4786587 (1988-11-01), Kuwabara
patent: 5766820 (1998-06-01), Fukawa et al.
Fukui Kouta
Sasaoka Senzo
Fuji Photo Film Co. , Ltd.
Le Hoa Van
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