Silver halide emulsion containing two-equivalent yellow dye-forming coupler
AssigneeMitsubishi Paper Mills Limited
InventorsYasushi Usagawa, Kiyoshi Yamashita, Mamoru Nakatani, Kosaku Masuda, Satoshi Kawakatsu
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Abstract
A compound represented by the general formula A-Q (wherein A represents a yellow dye image-forming coupler residue having the active methylene group from which one hydrogen atom has been replaced and Q represents a tetrazolyl group substituted at the 5-position with hydrogen, a halogen, a cyano, an alkyl, an aralkyl, an aryl, an alkyl-amino or an arylamino group) is used as a yellow dye image-forming coupler for obtaining yellow dye images that have good spectral absorption characteristics, and good stability to prolonged exposure to light, heat and high humidity.
Claims10
A silver halide photographic emulsion comprising a silver halide and a binder which contains, as a yellow dye image-forming coupler, a compound represented by the general formula A-Q, wherein A represents a yellow dye image-forming coupler residue having the active methylene group from which one hydrogen atom has been replaced and Q represents a tetrazolyl group substituted at the 5-position with hydrogen, a halogen, a cyano, an alkyl, an aralkyl, an aryl, an alkyl-amino or an arylamino group, the tetrazolyl group being attached at the 1 or 2 position.
A color developer solution which contains, as a yellow dye image-forming coupler, a compound represented by the general formula A-Q, wherein A represents a yellow dye image-forming coupler residue having the active methylene group from which one hydrogen atom has been replaced and Q represents a tetrazolyl group substituted at the 5-position with hydrogen, a halogen, a cyano, an alkyl, an aralkyl, an aryl, an alkyl-amino or an arylamino group, the tetrazolyl group being attached at the 1 or 2 position, and a color developer.
Dependencies are inferred from the claim text.