The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 1989
Filed:
Aug. 15, 1988
Kokichi Waki, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A silver halide color photographic material is provided, containing a pyrazoloazole type magenta coupler of the general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group which is removable by a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.N-- or --NH--; one of Za--Zb bond and Zb--Zc bond is a double bond and the other is a single bond; one of Za--Zb and Zb--Zc may optionally be condensed with a 5- to 7-membered ring when Za and Zb or Zb and Zc are both carbon atoms; R.sup.1 or X may form a dimer or higher polymer; when Za, Zb or Zc is a substituted methine group, said methine group may optionally form a dimer or higher polymer; characterized in that two or more monodispersed silver halide emulsions each having a different sensitivity are admixed and incorporated into the silver halide emulsion layer in said material, said monodispersed silver halide emulsion being regulated to have a ratio of .sigma./d of 0.2 or less, where .sigma. means a statistical standard deviation in the particle size distribution and d means an average particle diameter. The present silver halide color photographic material may form a magenta image of good light absorption, and the gradation control thereof is easy. Thus, the present photographic material is characterized by improved color reproductivity and tone reproductivity.