Konishiroku Photo Industry Co., Ltd.

Shoji Kikuchi

Takaya Endo

Hajime Wada

Takashi Sasaki

Hidetaka Deguchi

Takashi Uchida

Ryosuke Satoh

Haruo Hori

Mitsuto Fujiwhara

Shui Sato

Katsuo Mogaki

Syun Takada

Tugumoto Usui

Hiroyuki Imamura

Masahiko Taguchi

Toshiki Komaita

Tamotsu Kozima

Koichi Takabe

Wataru Ishikawa

Satoshi Nakagawa

Katsunori Kato

Ryosuke Sato

Kenichi Kishi

Kazuhiko Kimura

Shinji Yoshimoto

Haruhiko Sato

Mikio Sato

Keiichi Mori

Shui Satoh

Teruo Kagami

Sadatosi Kobayasi

Toshio Yajima

A color photographic material comprising a support and at least one layer thereon containing at least one compound of formula [I]: Formula [I] ##STR1## wherein R.sub.1 R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each are defined in the specification and claims of this application. The compound of formula [I] is incorporated in a color photographic material to prevent the discoloration and fading-in-color of the color photographic material.

Color photographic material

Silver halide photographic material containing hydroquinones and benzoquinones as anti-stain agents.

Light-sensitive silver halide color photographic materials

A color photographic material comprising a support and at least one layer thereon containing at least one compound of formula [I]: Formula [I] ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each are defined in the specification and claims of this application. The compound of formula [I] is incorporated in a color photographic material to prevent the discoloration and fading-in-color of the color photographic material.

The stability of a cyan dye image formed by phenol and naphthol couplers is improved with respect to 'dark fading' by incorporating in the silver halide color photographic material in which the dye image is formed at least one 2-phenyl benzotriazole compound having in the 2'-position an --OR group wherein R is an organic residue.

Color photographic material improved in fading properties

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

DIR coupler that forms colorless reaction product

Cyan couplers of the 2-equivalent type, useful in photography are described. These compounds are characterized in that they have at least one divalent group of the formula, --OCH.sub.2 CO--, in the molecule with a split-off group at the methoxy site of said divalent radical. Photographic materials and color developers incorporating these couplers are also described.

Photographic silver halide emulsion containing 2-equivalent cyan coupler

A light-sensitive silver halide photographic material containing a new development inhibitor releasing compound. The said compound has no hydrogen atom at the carbon atom which is adjacent to the carbonyl group and capable of coupling to an oxidation product of a color developing agent on the development.

Growing community of inventors

Hino, Japan

Shoji Kikuchi