Konica Corporation

Rieko Ren

Tomoyuki Nakayama

Akira Kawakami

Noboru Koyama

Sadayasu Ishikawa

Setsuko Kawahara

Yasuo Ando

Hiromoto Ii

Takuo Nishikawa

Noboru Nakajima

Tadahiro Nagasawa

Kenji Kumamoto

Miki Edamatsu

Silver halide emulsions are disclosed comprising tabular silver halide grains containing dislocation lines in the peripheral region of the major faces; the tabular grains comprising a high iodide phase which is internal to and along the dislocation lines and an internal region which is surrounded by the high iodide phase and comprised of substantially homogeneous silver halide phase and having an average iodide content of not more than 1 mol %. Silver halide photographic materials by the use of the emulsion are also disclosed.

Silver halide emulsion and silver halide photographic material by the use thereof

A silver halide emulsion comprising silver halide grains is disclosed, in which at least 50% of total grain projected area is accounted for by silver halide regular crystal grains exhibiting a proportion of a (100) face per grain of not less than 50% and having an average iodide content of not more than 5 mol %; the silver halide grains having an internal high iodide phase having an average iodide content of not less than 7 mol % and accounting for 0.1 to 15% of the grain volume; the high iodide phase being in the region at a depth of from 7 to 27% from the (100) face, based on the distance between the center of a grain and the (100) face.

Silver halide emulsion and silver halide light sensitive photographic material

A silver halide emulsion is disclosed, comprising silver halide grains having a variation coefficient of a grain diameter of 20% or less, at least 50% of total grain projected area being accounted for by tabular silver halide grains having an aspect ratio of 2 or more, said tabular grains each having 10 or more dislocation lines per grain in the peripheral region of the grain and having a variation coefficient of dislocation line length of 20% or less. A color photographic material by use of the emulsion is also disclosed.

Silver halide emulsion and silver halide color photographic material by

A magnetic recording medium is disclosed which is improved in the durability thereof. The recording medium has a support and plurality of magnetic layers formed thereon, which layers contain a ferromagnetic powder and binder. A bending stiffness of the medium is 150 to 450 mg and a difference in the bending stiffness between the medium and the medium without its uppermost magnetic layer is not more than 20 mg per 1 .mu.m of thickness of the uppermost layer.

Magnetic recording medium having a plurality of magnetic layers and a

There is disclosed a magnetic recording medium having excellent dispersability of ferromagnetic powder and ensuring stable production as well as excellent durability and electromagnetic conversion properties. The recording medium comprises a non-magnetic support and provided thereon at least one magnetic layer containing a ferromagnetic compound, wherein at least one of the magnetic layers contains:

Magnetic recording medium containing a specified ferromagnetic powder,

Disclosed is a magnetic recording medium comprising a non-magnetic support, and a first magnetic layer, a second magnetic layer and a third magnetic layer laminated on a non-magnetic support surface in this order, a total layer thickness of the second magnetic layer and the third magnetic layer of 0.7 .mu.m or less, and a coercive force of a ferromagnetic powder contained in the third magnetic layer being 1.2 to 2.5 times as strong as a coercive force of a ferromagnetic powder contained in the first magnetic layer.

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Hino, Japan

Rieko Ren