G - Physics – 03 – C
Patent
G - Physics
03
C
96/204
G03C 1/485 (2006.01)
Patent
CA 1249475
ABSTRACT OF THE DISCLOSURE The disclosure describes a direct-positive silver halide photographic material comprising a support, a silver halide emulsion layer comprising fogged silver halide particles prepared in the presence of a water soluble iridium salt or a water soluble rhodium salt, and a hydro- philic colloidal layer. The colloidal layer comprises a compound selected from the group consisting of compounds having the following Formula [I] and [II] and at least one compound selected from the group consisting of a compound having the following Formula [III] and a gold compound. Formula [I] Image wherein R1 is hydrogen, an alkyl, -SO3M or -COOM radical (wherein M is hydrogen, an alkaline metal or ammonium ion), and R2 is hydrogen or a lower alkyl radical, Formula [II] Image wherein R3 is hydrogen, an alkyl, -SO3M or -COOM radical (wherein M is hydrogen, an alkaline metal or ammonium ion), and R4 is hydrogen, an alkyl or -CH2-S-(CH2)n-Y' radical (wherein n is an integer of from 1 to 3, and Y' is hydrogen or -SO3M radical), Formula [III] Image wherein n is an integer of from 1 to 5, and Y is an alkylene radical having from 2 to 4 carbon atoms, provided not less than 2 Ys present inside the same molecule are allowed to be different alkylene radicals. This material has stable speed and a minimum density which is small under a high- temperature-high-humidity condition. Furthermore, it can be safely handled under a yellow lamp or in a bright room light free of untraviolet rays.
426445
Konishiroku Photo Industry Co. Ltd.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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