Konishiroku Photo Industry Co., Ltd.

Shui Sato

Takaya Endo

Tamotsu Kojima

Hiroyuki Imamura

Wataru Fujimatsu

Tugumoto Usui

Shoji Kikuchi

Tamotsu Kozima

Koichi Takabe

Shinichi Nakamura

Katsuo Mogaki

Hidehiko Ishikawa

Masahiko Taguchi

Shigemasa Itoh

Haruhiko Sato

Mikio Sato

Tomio Horiuchi

Kazumi Minahara

The present invention relates to a process for forming a yellow color image which requires contacting exposed silver halide grain with a developer in the presence of a particular yellow coupler.

Silver halide photographic materials containing photographic yellow

A process for forming a photographic magenta dye image is disclosed which requires contacting exposed silver halide with a color developing agent in the presence of a particular class of 2-equivalent magenta couplers.

Process for forming a photographic magenta dye image

The present invention relates to a process for forming photographic images using a 2-equivalent magenta coupler position a radical of the following general formula:

A coloured magenta coupler for photography is disclosed which is represented by the following general formula: ##STR1## wherein R is substituted phenyl, R.sub.1 and R.sub.2 individually stand for hydrogen, halogen, hydroxyl, alkyl, alkoxy or acylamino, with the proviso that one of R.sub.1 and R.sub.2 is hydroxyl but that both are not hydroxyl simultaneously, R.sub.3 is hydrogen, halogen, alkyl, nitro or acylamino and R.sub.4 stands for hydrogen, halogen or a monovalent organic residue.

Silver halide emulsion containing colored magenta coupler for photography

A silver halide photosensitive element using specifically defined yellow, magenta and cyan color couplers in the individual respectively blue, green and red-sensitive layers.

Silver halide multilayer photosensitive material

Process of forming dye images using color couplers containing a monohydro-polyfluoroalkyl group.

Process for forming color photographic images

A cyan coupler of the formula A -- NHCO(CF.sub.2 CF.sub.2).sub.n H wherein A is a phenolic or naphtholic cyan coupler residue and n is a positive integer of 1 to 7, incorporated in a light-sensitive silver halide photographic material produces a cyan dye photographic image which is favorable in light absorption characteristics and excellent in fastness when the coupler is developed with an aromatic primary amine type developing agent.

Process for forming cyan dye photographic images

An improved photographic system in which a new yellow coupler is employed. The yellow coupler has the formula, ##STR1## wherein X is a --N= or --CH= group; Cp is a residue formed by removing one hydrogen atom of the active methylene group of an acetanilide yellow coupler; n is an integer of 1 to 4; and R is a hydrogen or halogen atom, or an alkyl, alkoxy, alkylcarbonyl, aryl, arylcarbonyl, amino, acylamino, carboxyl, nitrile, aralkyl or aralkyloxy group, provided that in case n is 2 or more the R groups may be the same or different, and two adjacent R groups in combination may form a benzene ring.

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Hino, Japan

Shui Sato