Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Konishiroku Photo Ind. Co., Ltd.

Yoshihiro Haga

Syoji Matsuzaka

Toshifumi Iijima

Toshihiko Yagi

Takeo Koitabashi

Tetsuya Suzuki

Hiroshi Shimazaki

Yoshitaka Yamada

Kenji Kumashiro

Hideki Takiguchi

Akio Suzuki

Yasuo Taima

Atsuo Ezaki

Hiroshi Menjo

Katuya Yabuuchi

Hiroaki Shiozawa

Yoshiro Shigetomi

Yasumasa Numata

A silver halide light-sensitive photographic containing a hydrophilic colloid layer containg dextran or a compound of the following formula and subbing layer containing metal oxide is disclosed. ##STR1## R.sub.1 and R.sub.2 each independently represent a hydroxy group, --OM group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group, and M represents an alkali metal atom or an ammonium group and X represents two vinyl carbons substituted by R.sub.1 and R.sub.2 and an atom group necessary for forming a 5-6 ring together with carbonyl carbon.

Silver halide light-sensitive photographic material

A silver halide photographic emulsion is provided, wherein the silver halide emulsion contains silver halide grains having an average iodide content of less than 3 mol %, the silver halide grains comprising monodispersed core/shell type silver halide grains containing internally high iodide, the core/shell grains having two parallel twin planes and a substantially roundish hexahedral or tetradecahedral form.

Silver halide photographic emulsion

A silver halide photographic emulsion containing silver halide grains comprising {111} and {100} faces and having a silver iodide content of less than 2 mol %, wherein silver halide grains having 5 or more dislocations per grain account for not less than 50% of the total number of silver halide grains, the dislocations being located substantially on the {100} face.

Silver halide photographic emulsion, silver halide photographic

A silver halide color photographic material is described which is to be processed by a scheme including at least the step of development with a color developer having a pH of at least 11 wherein said material contains a specific pyrazoloazole based magenta coupler and a compound that react with the oxidized product of a color developing agent and which substantially lacks the ability to impart an image density. The color photographic material is improved in granularity and color reproduction and yet permits efficient desilvering.

Silver halide color photographic material

A silver halide color photographic light-sensitive material having an excellent adhesion resistance and capable of preventing deterioration of quality of processed images is disclosed. The light-sensitive material having a support and provided thereon, the photographic component layers including each at least one red-sensitive layer comprising at least a masking cyan coupler, green-sensitive layer comprising at least a masking magenta coupler, and blue-sensitive layer, is characterized by that:

Silver halide color photographic light-sensitive material

A silver halide photographic material is disclosed. The material has at least one silver halide emulsion layer on a support, said silver halide emulsion layer containing a coupler which forms a mobile dye by coupling reaction with the oxidized product of a color developing agent, and said silver halide emulsion layer having in association therewith a non-light sensitive layer containing substantially non-light sensitive fine silver halide grains.

Silver halide photographic material

A light-sensitive silver halide photographic material having silver halide emulsion layers on a support, wherein at least one layer of said silver halide emulsion layers contains surface latent image type mono-dispersed silver halide grains, and 50% or more of the silver halide grains contained in said at least one silver halide emulsion layer are regular surface latent image type mono-dispersed silver halide grains of tetradecahedral crystals whose external surfaces have crystal faces with Miller indices (100) and (111), the area ratio of said (100) face and said (111) face satisfying the relation represented by the correlation formula (I) shown below:

Light-sensitive silver halide photographic material

There is disclosed a method for preparing a silver halide photographic emulsion by use of an ammoniacal silver nitrate solution in a double-jet manner, characterized in that the method comprises the step of maintaining the ratio between the maximum and minimum solubility of the silver halide in a silver halide photographic emulsion at 3 or less after 1/10 of the total amount of the solution containing silver halide has been used. The method according to the present invention provides a monodispersed silver halide photographic emulsion which has a high sensitivity, i.e., which comprises silver halide having a relatively large crystal size.

Method for preparing silver halide photographic emulsion

There is disclosed a light-sensitive silver halide photographic material having at least one silver halide emulsion layer constituted of a plural number of layers which are substantially the same in color to which they are sensitive but different in sensitivity provided on a support, which comprises a layer having the highest sensitivity among the plural number of layers with different sensitivities which contains at least two kinds of substantially mono-dispersed silver halide grains with different average grain sizes. The light-sensitive silver halide photographic material according to this invention is high in sensitivity and excellent in graininess of dye image.

A light-sensitive silver halide emulsion is disclosed, which comprises cores composed of silver halide grains and shells covering the cores. The cores consist essentially of silver halide containing silver iodide, and the shells consist essentially of silver bromide, silver chloride or silver chlorobromide excluding silver iodide. The shells have a thickness of from 0.01 to 0.1.mu.. This light-sensitive silver halide emulsion has high sensitivity and superior covering power.

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Hino, Japan

Yoshihiro Haga