Konishiroku Photo Industry Co., Ltd.

Hokuetsu Paper Mills, Ltd.

Sadatugu Terada

Masao Ishihara

Hiroyuki Takagiwa

Tsuneo Wada

Kiyoshi Tamaki

Hideki Murata

Masao Asano

Akitoshi Matsubara

Yuzuru Sato

Makoto Tomono

Eiichi Sakamoto

Masayoshi Mayama

Toshio Muramatsu

Hiroshi Yamada

Hideaki Arai

Masayuki Kimura

Satoshi Haneda

Syunji Matsuo

Koichi Nagayasu

Hiroshi Sugita

Teiji Habu

Katsumi Matsuura

Masaru Kanbe

Hisashi Yamaguchi

Naoto Abe

Kenichi Kitahara

Tohru Kobayashi

Isamu Fushiki

Keiji Sato

Koichi Horigome

Sigeharu Koboshi

Norio Chiba

Hiroshi Tokura

Mamoru Komiya

Kenji Itoh

Hideyuki Anzai

Kazuo Nakazato

Masao Ishibara

Thuneo Wada

The invention relates to a method for producing a toner by polymerizing an aqueous suspension of a monomer in the presence of a dispersant selected from orthophosphate, pyrophosphate and polyphosphate, a colorant and an anionic surfactant. The polymerization product is then treated with dilute acid and rinsed with water whereby the dispersant is removed from the polymerization product.

Method for the production of toner for electrophotography and the toner

Herein disclosed are a toner composition for the development of electrostatic latent images which comprises a polymer obtained by polymerizing a polymerizable monomer or monomers in the presence of a chlorinated polyolefin, and a method for preparing the same.

Toner composition for the development of electrostatic latent images and

A magnetic toner comprising nuclear particles comprising lyophilic magnetic particles and a resin having a low softening point is disclosed. Each of the nuclear particles is surrounded by a resin wall.

Encapsulated lyophilic magnetic particle and resin toner

A process for manufacturing towers and their use in developing an electrostatically charged image comprising polymerized grains formed by the suspension polymerization of an alpha-beta unsaturated polymeric monomer or monomers in the presence of a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide titanium hydroxide and thorium hydroxide.

Toner for developing an electrostatically charged image and

An electrostatic image developing toner comprising polymer particles produced by suspension polymerization of a polymerizable monomer in the presence of an emulsification-preventing agent. Such toners produce images of high image density.

Electrostatic image developing toner and a method for the production

A silver halide photographic material containing a solution of a 5-pyrazolone type magneta coupler and a high-boiling organic solvent of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent an aliphatic or aromatic group with a carbon atom of R.sub.3 directly bonded to the phosphorus atom.

Light-sensitive silver halide photographic materials

Disclosed are carrier compositions for electrophotographic developers comprising core particles coated with a mixture of a resin and an organic surfactant having at least one carbon-fluorine bond and at least one functional group having an affinity for the resin. An intermediate resin layer may be present on the core particles, which themselves may be metal, glass or silicon dioxide, e.g.

Coated developer carrier for electrophotography

A process for the preparation of a silver halide photographic material is disclosed which provides for the formation of a photographic layer by the use of a coating solution containing a compound represented by formula I or II.

Process for the preparation of light-sensitive silver halide

An antistatic light-sensitive silver halide photographic element having an addition copolymer of glycidol and ethylene oxide with a phenol-aldehyde condensate as the antistatic agent, is described.

Antistatic light-sensitive silver halide photographic element

A photographic light-sensitive material comprising a layer which contains a compound represented by the following Formula I ##STR1## wherein R.sub.1 is an alkyl group having 1 to 18 carbon atoms, R.sub.2 is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms with a proviso that when R.sub.2 is a hydrogen atom, R.sub.1 is an alkyl group having 1 to 7 carbon atoms, M is a cation and n is a number of 1 to 50.

Photographic light-sensitive material

A color diffusion transfer photographic unit is disclosed which contains a silver halide photosensitive element having a support and at least one silver halide emulsion layer thereon and an image receiving element having a support and an image receiving layer thereon wherein the unit contains a polymer having a first monomer which contains a tertiary nitrogen atom wherein at least 5 mole % of said first monomer is grafted and/or graft-copolymerized with a second monomer which is a vinyl monomer having a tertiary or quaternary nitrogen.

Color diffusion transfer unit with polymeric quaternary nitrogen mordant

There is disclosed an improvement in a diffusion transfer photographic material having a transparent support, a receiving layer, a silver halide emulsion layer, and a neutralization layer, wherein the neutralization layer contains a copolymer containing fluorine.

Diffusion transfer photographic material with fluorine containing

The present invention relates to a color diffusion transfer photographic unit containing a silver halide photosensitive element, and an image receiving element wherein said unit contains a copolymer containing two monomers. The first monomer is noted for having quaternary nitrogen while the second monomer is required to have at least one fluorine atom.

Color diffusion transfer photographic unit

In the processing of developed imagewise exposed silver halide photographic material with a solution having fixing ability, the fixing efficiency is improved and environmental pollution prevented by employing a solution containing bromine ions or iodine ions as the fixing agent and incorporating in said solution or in a post-bath solution, a polymer having in its molecular structure pyrrolidone nucleus units and a molecular weight of about 2,000 to 500,000.

Process for the treatment of photographic materials

Static resistance of a light-sensitive silver halide photographic material is improved by treating said material with a solution or dispersion of a polymer containing quaternary ammonium groups, and which also acts as an antifoaming agent in processing solutions. The polymeric moiety of the polymer has the formula ##STR1## WHEREIN R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are individually a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms; A and B are individually an alkylene group having 1 to 4 carbon atoms, a hydroxymethylene group, a phenylene group or a mere bond; X.sub.1.sup..crclbar. and X.sub.2.sup..crclbar. are individually an anion; and n is an integer of 10 to 30.

Growing community of inventors

Hino, Japan

Sadatugu Terada