Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1993-06-02
1995-10-31
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430384, 430385, 430558, 430567, 430570, 430576, 430585, 430587, 430588, 430590, G03C 108
Patent
active
054628474
ABSTRACT:
A silver halide color photographic material is provided comprising at least one yellow-developable silver halide emulsion layer, at least one magenta-developable silver halide emulsion layer and at least one cyan-developable silver halide emulsion layer on a support, characterized in that said at least one cyan-developable silver halide emulsion layer comprises at least one cyan dye-forming coupler represented by the following general formula (Ia) and silver bromochloride or silver chloride emulsion grains substantially free of silver iodide having a silver chloride content of 95 mol % or more spectrally sensitized with at least one sensitizing dye having a reduction potential of -1.27 V (vs. SCE) or lower: ##STR1## wherein Za represents --NH-- or --CH(R.sub.3)--; Zb and Zc each represents --C(R.sub.4).dbd. or --N.dbd.; R.sub.1, R.sub.2 and R.sub.3 each represents an electron withdrawing group having a Hammett's substituent constant .sigma..sub.p value of 0.20 or more, with the proviso that the sum of .sigma..sub.p of R.sub.1 and R.sub.2 is 0.65 or more; R.sub.4 represents a hydrogen atom or substituent, with the proviso that if two R.sub.4 's are present in the general formula, they may be the same or different; X represents a hydrogen atom or a split-off group from the rest of the structure upon coupling reaction with an oxidation product of an aromatic primary amine color developing agent; and R.sub.1, R.sub.2, R.sub.3, R.sub.4 or X may be a divalent group which is connected to a dimer or higher polymer or a high molecular chain to form a homopolymer or copolymer.
The silver halide emulsion to be incorporated in said cyan-developable silver halide emulsion layer is gold-sensitized.
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Bowers Jr. Charles L.
Fuji Photo Film Co. , Ltd.
Letscher Geraldine
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