Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Toshihiko Yagi

Kenji Michiue

Syoji Matsuzaka

Toshifumi Iijima

Hiroshi Shimazaki

Yoshitaka Yamada

Katsumasa Yamazaki

Sohei Goto

Yoshiharu Mochizuki

Minoru Ishikawa

Toshiya Kondou

Hideki Takiguchi

Kenji Kumashiro

Hiroyuki Hoshino

Hideaki Haraga

Atsuo Ezaki

Yoshihiro Haga

Katsuhiko Heki

Shin-ichi Yamamoto

Miki Kon

Shigeharu Koboshi

Satoru Kuse

Katsuhiko Suzuki

Masao Ishikawa

Eiichi Ueda

Masaru Iwagaki

Noriki Tachibana

Hiroshi Ikeda

Sadayasu Ishikawa

Satoru Shimba

Fumie Fukazawa

Hideo Akamatsu

Yoshikazu Watanabe

Yasushi Irie

Hisashi Yamaguchi

Fumio Hamada

Hiroshi Menjo

Shinya Shimura

Hiroshi Inoie

Yoshiro Ito

Keisuke Tobita

Yoshiro Shigetomi

Katsutoyo Suzuki

Koji Tashiro

Mikio Miura

Katutoyo Suzuki

Tetuya Suzuki

Harumi Asakawa

Hiroshi Ideda

Yoshihide Urakawa

Yoshihara Mochizuki

Masaru Tsukamoto

The present invention describes a silver halide color negative photographic light-sensitive material having an improved graininess and an excellent image quality even when picture-taken under various light sources each having a color temperature different from daylight. A silver halide color photographic material comprises a light-sensitive layer unit containing a red-sensitive silver halide emulsion and a cyan coupler, a light-sensitive layer unit containing a green-sensitive silver halide emulsion and a magenta coupler, and a light-sensitive layer unit containing a blue-sensitive silver halide emulsion and a yellow coupler, wherein RMS granularity of at least one of the light-sensitive layer units has the following relations;

Silver halide color negative photographic light sensitive material

A silver halide photographic light-sensitive material, having provided at least one silver halide emulsion layer on a support and a back coating layer on the other side thereof, wherein the support has a loss modules at 50.degree.C. of 0.03 or more, is disclosed. The back coating layer has a gelatin content of 6 g/m.sup.2 or less, and the ratio of the gelatin content of the back coating layer to that of the emulsion layer was 0.3 or more.

Silver halide photographic light-sensitive material

There is disclosed a silver halide photographic light-sensitive material having an excellent interimage effect and gradation property. The light-sensitive comprises at least one light-sensitive layer containing silver bromoiodide emulsion consisting primarily of the twinned grains, wherein in an X-ray diffraction diagram which is obtained by subjecting the silver bromoiodide grains to a (420) X-ray diffraction with a CuK.alpha. ray, an intercept between the intersection points of a maximum peak diagram and a line drawn horizontally at a point of 0.13 times the height of the maximum peak corresponds to not less than 1.5 degree of a diffraction angle (2.theta.).

Silver halide photographic light-sensitive material having a high

A novel photographic silver halide emulsion is disclosed, which is useful in a color photographic silver halide material to provide improvements in image quality, storage stability and pressure resistance. The photographic silver halide emulsion comprises silver halide twinned crystal grains each having a ratio of grain diameter to grain thickness of 5 or less which amount to 50% or more by projection area of total grains, wherein X-ray diffraction pattern of the twinned crystal grains with Cu-K.alpha. ray as a radiation source has a (420) diffraction signal having a single peak; and the width of the peak at a height of 0.13 times the maximum peak height, based on the signal intensity, is 1.5 degree or less in a diffraction angle, 2.theta..

Silver halide photographic emulsion materials

There is disclosed a silver halide light-sensitive color photographic material having a high sensitivity and excellent granularity. The photographic material contains in at least one of the emulsion layers the core/shell type tabular silver halide grains comprising:

Silver halide light sensitive color photographic material

A silver halide photographic light-sensitive material comprises a silver halide photographic emulsion containing tabular silver halide twin crystal grains having a ratio of grain diameter to thickness of less than 5, wherein projection areas of said silver halide grains are 50% or more of total projection area of all grains; and said silver halide grains are monodipersed and have relatively high iodide content in the interior of the grain. The silver halide grain emulsion is prepared by supplying a silver component and a halide component in the presence of continuously supplied silver halide grains whose solubility product is lower than that of growing monodispersed silver halide grains for at least a given period of time during the grain growth. The photographic material provides improved sensitivity and image quality.

Silver halide photographic light sensitive material

A light-sensitive silver halide color photographic material is disclosed. The color photographic material is stored in roll, and has a value of ##EQU1## being 20 to 60 .mu.m, wherein at least one silver halide emulsion layer contains a silver halide emulsion containing silver chrolide in a proportion of not less than 10 mol %. The photographic material is excellent in resistant to pressure desensitizing and preventive from producing scratching trouble. A photographic unit containing the photographic material is also disclosed.

Silver halide color photographic light sensitive material stored in roll

A silver halide photographic emulsion containing silver halide twinned-crystal grains is prepared by the steps of (a) forming silver halide nuclear grains by mixing a water soluble silver salt and a water soluble halide, (b) forming silver halide seed-emulsion grains by carrying out ripening of the nuclear grains formed in (a), and (c) growing the seed-emulsion grains, wherein a water soluble polymer is introduced by (b), having the repetition unit represented by the following formula [P] in an amount of 10 to 100 mol % per each polymer molecule: ##STR1##

Process for preparing a silver halide emulsion

A silver halide color photographic light-sensitive material of which the color reproducibility and printing suitability are kept improved against the variation of photographing conditions, such as a change in light source, is disclosed. The photographic material comprises a support and provided thereon a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a blue-sensitive silver halide emulsion layer, wherein at least one of said emulsion layers is of three-layer structure comprising a low-speed elemental emulsion layer, a medium-speed elemental emulsion layer and a high speed emulsion layer arranged in this sequence from the side facing the support, and a maximum color density of said medium-speed emulsion layer is not more than 0.35.

Silver halide color photographic light-sensitive material

A method for manufacturing a silver halide emulsion. By the method, a silver halide emulsion comprising monodisperse silver halide grains having a high aspect ratio can be manufactured without use of low molecular weight gelatin. The method has the steps of

Method for manufacturing silver halide emulsion in which the ripening

A silver halide photographic light-sensitive material improved in gradation and processing stability is disclosed. The material has a support and provided thereon a blue-sensitive emulsion layer, a green-sensitive emulsion layer and red-sensitive emulsion layer, wherein at least one of said color-sensitive emulsion layers contains; tabular silver halide grains having an aspect ratio of not less than 1.2; and core/shell type regular crystal silver halide grains of which the average projection area accounts for not more than 40% of that of the tabular grains.

Silver halide photographic light-sensitive material improved in

There is disclosed a light-sensitive silver halide photographic material, having two or more light-sensitive silver halide emulsion layers different in color sensitivities on a support, at least one of the light-sensitive silver halide emulsion layer comprises monodispersed silver halide grains containing 8 to 30 mole % of silver halide in core or contains twinned crystal silver halide grains, at least two of the light-sensitive silver halide emulsion layers different in color sensitivities containing a DIR compound capable of releasing a developing inhibitor or developing inhibitor precursor through the reaction with the oxidized product of a developing agent, the developing inhibitor or developing inhibitor precursor released from the DIR compound being diffusive, wherein the following conditions A:

Light-sensitive silver halide color photographic material having

There is disclosed a light-sensitive silver halide photographic material having at least one silver halide emulsion layer containing silver halide crystal grains which comprises at least one of the silver halide emulsion layer contains silver halide crystal grains which satisfy the following conditions of:

Light-sensitive silver halide photographic material

A method for forming color photographic images is disclosed. The method comprises steps of

Method for processing silver halide color photographic light-sensitive

A silver halide color photographic photosensitive material is disclosed. The material comprises a support and coated thereon at least one green sensitive silver halide emulsion layer, at least one red sensitive silver halide emulsion layer, a plurality of blue sensitive silver halide emulsion layers having different photosensitive speed, said material comprising three or more silver halide emulsion layers having substantially the same color sensitivity, wherein a first blue sensitive silver halide emulsion layer is provided on the outermost side from the support, at least one of green sensitive silver halide emulsion layers and at least one of red sensitive silver halide emulsion layers are provided between the first blue sensitive silver halide emulsion layer and a second blue sensitive silver halide emulsion layer with lower photosensitive speed than the first blue sensitive silver halide emulsion layer, and the layer with highest photosensitive speed of said three or more silver halide emulsion layers having substantially the same color sensitivity has a maximum color density of not higher than 1.0.

Silver halide color photographic photosensitive material

Growing community of inventors

Hino, Japan

Toshihiko Yagi