Silver halide photographic light-sensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsKiyoteru Miyake, Tadashi Ikeda
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Abstract
There is disclosed a silver halide photographic light-sensitive material which contains, on a support, a specific nitrogen-containing heterocyclic compound, and a divalent metal cation that is an acid with intermediate hardness/softness classified in accordance with the HSAB principle, in an amount 1 to 300 times the number of moles of the nitrogen-containing heterocyclic compound. The light-sensitive material can form an image with high sensitivity and low fogging, both in heat-development processing characterized by its ease and rapidness, and in usual liquid-developing processing that is widely used.
Claims12
A silver halide photographic light-sensitive material, which contains, in a silver halide emulsion layer on a support, at least one nitrogen-containing heterocyclic compound represented by one of general formula (1), (2), (3), (4) or (5), a divalent metal cation that is an acid with intermediate hardness/softness classified in accordance with the HSAB principle, in an amount 1 to 300 times the number of moles of the nitrogen-containing heterocyclic compound, and an anion acting as a counter ion, the anion being selected from the group consisting of a nitrate ion, a sulfate ion, a chloride ion, a bromide ion, an iodide ion, a carbonate ion, a sulfite ion, a bicarbonate ion, a bisulfite ion, an ammonium ion, an acetate ion and a phosphate ion, wherein the nitrogen-containing heterocyclic compound and the divalent metal cation are included in the same silver halide emulsion layer:
- ##STR27## wherein R.sub.a, R.sub.b, R.sub.c, and R.sub.d each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, an amino group, an acylamino group, a ureido group, a urethane group, a sulfonamide group, a sulfamoyl group, a carbamoyl group, a sulfonyl group, an oxycarbonyl group, an acyl group, an acyloxy group, an alkylthio group or an arylthio group, in which the number of carbon atoms of the R.sub.a is 4 or more but 16 or less, the total number of carbon atoms of the R.sub.b is 10 or more, and the sum of carbon atoms of R.sub.c and R.sub.d is 12 or more;
- each of T represent a nitrogen atom, C--H or C--SH;
- each of U represent a nitrogen atom, C--H, C--SH or C--R.sub.a, and at least one of them is C--R.sub.a ;
- each of X represent a nitrogen atom or C--H;
- Y represents an oxygen atom, a sulfur atom, or N--H;
- M, if it is univalent, represents a hydrogen atom, an alkali metal atom, a quaternary ammonium group, or a quaternary phosphonium group, with n being 1;
- M, if it is divalent, represents an alkaline earth metal atom, a cadmium, or an atom being a divalent metal cation having intermediate hardness/softness in accordance with the HSAB principle, with n being 2;
- M, if it is trivalent, represents a boron, an aluminum, or an iron, with n being 3;
- in general formulae (1) and (2), the benzene ring may have a substituent.
Dependencies are inferred from the claim text.