Konishiroku Photo Industry Co., Ltd.

Takaya Endo

Shoji Kikuchi

Tamotsu Kojima

Mitsuto Fujiwhara

Shui Sato

Hajime Wada

Ryosuke Satoh

Hiroyuki Imamura

Wataru Fujimatsu

Hidetaka Deguchi

Haruo Hori

Tugumoto Usui

Wataru Ishikawa

Satoshi Nakagawa

Katsunori Kato

Toshiki Komaita

Tamotsu Kozima

Koichi Takabe

Toyoaki Masukawa

Ryosuke Sato

Kazuhiko Kimura

Shinji Yoshimoto

Shigemasa Itoh

Akio Iijima

Shui Satoh

Shouji Kikuchi

Teruo Kagami

Sadatosi Kobayasi

Osamu Ezawa

Tomio Horiuchi

Kazumi Minahara

A photographic yellow coupler having a general formula selected from the group consisting of (I), (II) and (III) ##STR1## wherein A is a yellow coupler residue defined by removing one hydrogen atom of a active methylene group from a yellow coupler having the active methylene group; Q is a group having a formula selected from the group consisting of ##STR2## and ##STR3## (where X and Y are individually a hydrogen atom or an alkyl, acyl, aryl or aralkyl group; Z is a hydrogen atom or an alkyl, aryl or aralkyl group; and R.sub.1 and R.sub.2 are individually a hydrogen atom or an alkyl, aryl or aralkyl group or both of R.sub.1 and R.sub.2 together may form a benzylidene group or a cycloalkyl group); and Q' is a group of the formula --CH.sub.2 --CH.sub.2 -- or ##STR4## (wherein R.sub.3 is a hydrogen or halogen atom or an alkoxy group; R.sub.4 is a hydrogen or halogen atom, an amino, acylamino, ureido, lower alkyl, alkoxy or hydroxy group; and R.sub.4 and R.sub.5 are individually a lower alkyl group).

Photographic silver halide materials containing yellow coupler

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

The present invention relates to a method of forming a dye image which involves processing a light-sensitive silver halide photographic image, after its imagewise exposure, in the presence of a novel yellow coupler as depicted in the formula below and an aromatic primary amine color developing agent ##STR1## wherein R.sub.1 represents cyano, alkyl carbonyl, phenylalkyl carbonyl, phenoxy alkyl carbonyl, phenylthio alkyl carbonyl, arylcarbonyl, alkyl phenyl carbonyl, alkoxy phenyl carbonyl, R.sub.2, R.sub.3, R.sub.4, R.sub.5 independently are hydrogen, halogen, alkyl, alkoxy, aryloxy, alkylacyloxy, arylacyloxy, acylamino, N-alkyl carbamoyl, N-phenylcarbamoyl, alkylsulfonamido, arylsulfonamido, N-alkyl sulfamoyl, N-phenylsulfamoyl, or imido, R.sub.6 represents cycloalkyl, alkenyl, naphthyl, thienyl, benzothienyl, furyl, or pyranyl, or a group of the formula (II): ##STR2## wherein R.sub.7, R.sub.9 and R.sub.11 are each hydrogen or alkyl, the sum of the carbon atoms in R.sub.7, R.sub.9 and R.sub.11 being 5 to 20, R.sub.8 and R.sub.10 are hydrogen, and Y represents non-metal atoms required for forming 2,5-dioxo-imidazolidine, 2-3,5-trioxo-imidazolidine, 2,5-dioxo-triazolidine, 2,4-oxazolidinedione, 2,4-thiazolidinedione, 2(1H)-pyridone, 2(1H)-pyrazone, 5(1H)-imidazolone, 5(1H)-triazolone, 2(1H)-pyrimidone, 2-pyrazolone (5), 2-isothiazolone(5), 2(1H)-quinaoxazolone, 4(3H)-pyrimidone, 2-benzoxazolone, 4-isooxazolone(5), 3-fluorone(2), 4-imidazolone(2), 3-pyrazolone, 2-tetrazolone(5), 3-tetrazolone(5), and derivatives thereof.

Method of forming dye image

A color photographic material comprising a light-sensitive silver halide emulsion layer coated on a support containing a magenta coupler represented by general formual [I] or [II]: ##STR1## wherein, R.sub.1 represents a hydrogen atom, an alkyl, aryl or 5 or 6-membered heterocyclic group, R.sub.2 represents a hydrogen atom, an alkyl, aryl, 5 or 6-membered heterocyclic, amino, sulfamoyl or carbamoyl group, R.sub.3 represents an alkyl, aryl or 5 or 6-membered heterocyclic group having from 12 to 35 carbon atoms, R.sub.4 represents an alkyl group having from 2 to 8 carbon atoms or a phenyl group, and R.sub.5 represents an alkyl group having from 2 to 8 carbon atoms.

Light-sensitive silver halide color photographic materials

A photographic material having a light-sensitive silver halide emulsion layer coated on a support and containing a compound, useful as a development inhibitor of the formula: ##STR1## wherein X, Y and Z are as herein defined, is described.

Light-sensitive silver halide photographic materials

A process for forming a cyan dye image by using a novel photographic 2-equivalent cyan coupler which is characterized by having a splitt-off group of the below-indicated general formula at the active position of the cyan coupler so that the oxy portion is present on the side of the active position: ##STR1## wherein R.sub.1 and R.sub.2 stand for a hydrogen atom or an organic group, provided at least one of R.sub.1 and R.sub.2 should be an organic group, is disclosed.

Process for forming a cyan dye image by the use of a 2-equivalent cyan

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

A process for forming color photographic images using magenta couplers which afford excellent resistance to formalin, is described.

Process for forming magenta dye images

A novel two-equivalent naphthol or phenol type cyan coupler is disclosed wherein the active position thereof has a split-off group which contains a bonding group of the formula ##STR1## wherein R is hydrogen atom or a divalent organic group. The present coupler is incorporated into a photographic material containing a photosensitive emulsion layer.

Silver halide emulsion containing two equivalent type coupler for use in

Cyan couplers of the 2-equivalent type having the formula ##STR1## wherein C.sub.p, R.sub.1 -R.sub.6, Z, n, p and q are herein defined are described. These couplers are useful in photography, and photographic materials and developers incorporating these couplers are also described.

Dye image forming process

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:

Color developers represented by the following general formula are useful as color developing agents: ##STR1## R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are defined herein.

Color photographic developing composition

The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of a developing agent to release a substance promoting bleaching of developed silver at the bleaching or blixing step after the development treatment is incorporated into at least one layer constituting said photosensitive material.

Photosensitive material for color photography

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 light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.

Growing community of inventors

Hino, Japan

Takaya Endo