Konishiroku Photo Industry Co., Ltd.

Ken-ichi Kishi

Takahira Kasuya

Masaru Kanbe

Toshiaki Takahashi

Shinobu Korematsu

Tsuneo Suga

Kenzi Tuzita

Kiyoshi Kimura

Meizo Shirose

Jiro Takahashi

Tsuneo Wada

Kunio Ito

Satoshi Nakagawa

Hiroshi Sugita

Morito Uemura

Yuki Okuyama

Keiji Sato

Tuneo Daidoji

Shuzi Kida

This invention relates to a magnetic toner (3b) composed mainly of a magnetic material and a binder resin, in which the difference between the softening point and the softening initiation temperature of said magnetic toner (3b) is made 5.degree. C. or more to provide a magnetic toner (3b) which is suitable for pressing transfer, particularly pressing transfer by use of an intermediate transfer member and capable of giving stable running characteristics without causing off-set phenomenon according to a conventional developing system without use of no special developing system and regardless of the photosensitive member employed as well as good image quality on a plain paper.

Process for transfer of a toner image utilizing a magnetic toner

A developer for developing an electrostatic latent image comprising colored electroscopic particles and at least one silicon dioxide powder having its particles made hydrophobic with a specified organosilicon compound is disclosed. Silicon atoms in said organosilicon compound are bonded to silicon atoms on the surface of individual silicon dioxide particles through oxygen atoms. At least one organic group in the organosilicon compound has a total carbon number of 8 or more and is a saturated or unsaturated aliphatic organic group with at least 5 carbon atoms or an organic compound having a hydrocarbon ring. In a preferred embodiment, such a silicon dioxide powder is used in combination with another silicon dioxide powder whose particles are rendered hydrophobic by an organosilicon compound wherein any of the organic groups present has a total carbon number of 7 or less and is a saturated or unsaturated organic group with not more than 4 carbon atoms or an organic group having a hydrocarbon ring.

Developer for electrostatic latent image and method of forming image

A method of fixing a toner image on a supporting member by bringing the supporting member supporting thereon the toner image into pressure contact with a fixing roller, wherein an elasticity improving agent for increasing the elasticity of the toner upon coming into contact with the toner is disposed on a member which comes into direct or indirect contact with the outer circumferential surface of the fixing roller. The elasticity improving agent is a material causing the reaction which increases the molecular weight of the binder resin of the binder and/or a reaction promoter for such a reaction. The elasticity improving agent is selected from a group consisting of:

Method of fixing toner image

There is disclosed a light-sensitive silver halide photographic material containing a compound represented by the formula (I): ##STR1## wherein G, R.sub.1, R.sub.2 and X have the same meanings as defined in the specification. The 1-naphthol coupler which is contained in the light-sensitive silver halide photographic material is high in reactivity with an oxidized product of a color forming developing agent and can efficiently impart imagewise photographic effects to light-sensitive silver halide photographic materials.

Light-sensitive silver halide color photographic material

An improved silver halide photosensitive material of the lith-type is disclosed which is suitable for an infectious development in order to obtain high contrast images with high sensitivity. A method for developing the material is also disclosed. The material comprises silver halide grains containing at least 50 mole per cent of silver chloride, less than 40 mole per cent of silver bromide and less than 5 mole percent of silver iodide based on total silver halide, the average size of the grains being 0.05 to 0.5 microns in diameter. The material further comprises a compound represented by the following general formula I or II ##STR1## wherein R is alkyl, aryl, aralkyl or acyl; R' is hydrogen or --OR; and R' is hydrogen or acyl.

Lith-type silver halide photosensitive material containing a

An improved method for adjusting bromide ion concentration in a photographic processing solution is disclosed in which the processing solution is contacted with particles of an insoluble bismuth compound.

Method for adjusting the bromide ion concentration in a photographic

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Hachioji, Japan

Ken-ichi Kishi