Abstract: A pressure fixing method comprising passing a base carrying a toner image through a pair of rollers is disclosed. The toner contains a prepolymer and the rollers are loaded with a linear pressure of from 5 to 70 kg/cm.

Abstract: 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.

Abstract: High-contrast light-sensitive silver halide photographic material which comprises a support, a silver halide emulsion layer containing silver halide and another hydrophilic colloidal layer coated on the support, at least one of said silver halide emulsion layer and another hydrophilic colloidal layer containing a substantially non-diffusible compound having oxidizing power on a hydroquinone developing agent, and the thickness, in an aqueous solution having the composition described as in the specification kept at 23.degree. C., of said at least one layer being from 1.2-4.5 times that of said layer dried in an atmosphere at 23.degree. C. at a relative humidity of 55%.

Abstract: In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance in dispersed polymer particles in an aqueous polymer latex, the improvement comprises impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is solid state, a water-miscible organic solvent and aqueous polymer latex wherein a polymer of the polymer latex is prepared from ethene monomers and containing at least one hydrophilic group.

Abstract: A light-sensitive silver halide photographic material containing a tetrazolium compound, is treated with a developing solution containing no hydroquinone developing agent, which material comprises a support and a silver halide emulsion layer coated thereon, containing silver halide grains having an average grain size of 0.05 to 1.5.mu., at least 75% of said grains being within a range of 0.6 to 1.4 times the said average grain size and a sensitizing dye.

Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of 0.05 to 1.5.mu. and a tetrazolium compound and a method of processing thereof.

Abstract: Light-sensitive silver halide photographic materials which comprise a support, a hydrophilic colloidal layer coated thereon which contains a silver halide emulsion layer and tetrazolium compounds, said silver halide emulsion layer containing a combination of two types of specific sensitizing dyes.

Abstract: A method of processing light-sensitive silver halide photographic material to be treated with a developing solution containing no hydroquinones developing agent, which material comprises a support, a silver halide emulsion layer coated thereon containing silver halide grains having an average grain size of 0.1 to 0.8.mu., at least 75% of said grains being within a range of 0.6 to 1.4 times the said average grain size, and a tetrazolium specified compound.

Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon which contains silver halide grains having an average grain size of 0.05 to 1.5.mu., a tetrazolium compound and a sensitizing dye.

Abstract: In a process for providing a color image which comprises imagewise exposing a multilayered light-sensitive photographic material comprising a support and a light-sensitive silver halide emulsion layer not having a coupler incorporated therein and thereafter developing said exposed photographic material with a coupler-containing color developer, the speed and color density of the image are improved by incorporating into the light-sensitive silver halide emulsion layer or the layer contiguous therewith oil particles of a high boiling solvent such as phthalate, phosphate, amide and alcohol type solvents.

Abstract: A light-sensitive silver halide photographic material comprising a m-aminophenol type coupler of the structure particularly defined therein is disclosed, which can successfully yield an excellent image stable against oxidation.

Abstract: Process of forming a high-contrast silver image which process comprises treating a light-sensitive silver halide photographic material comprising a support, a silver halide emulsion layer coated thereon and another hydrophilic colloidal layer, at least one of which contains a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent, with a developer containing no hydroquinone developing agent after exposed imagewise.

Abstract: An improved process for forming an amplified dye image on an image-wise, exposed light-sensitive silver halide photographic material is described, which, after developing, is processed with an amplifying solution the improvement being in that (a) the coupler is in stoichiometric excess of at least 50% relative to the amount of silver halide, (b) the dry thickness ratio of the hydrophilic colloid layer to the silver halide emulsion layer is 1 to 10 and (c) the amplifying solution contains hydrogen peroxide.

Abstract: A light-sensitive silver halide photographic material containing a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent in a hydrophilic colloidal layer is processed, after light exposure, with a developer containing the said hydroquinone developing agent to form a high-contrast silver image.

Abstract: Process for forming high-contrast silver images which comprises treating a light-sensitive silver halide photographic material provided with a hydrophilic colloidal layer containing a silver halide emulsion layer coated on a support and containing a tetrazolium compound, after imagewise exposure, with a developer and/or a processing solution prior to the developing, both of which contains at least a nitrogen-containing heterocyclic compound substituted with at least mercapto, thioketone or thioether group.

Abstract: There is disclosed a process for the production of a dye image on a silver halide photograhic material which comprises imagewise exposing the photographic material to light and then subjecting the photographic material to development in the presence of both a particular polyfunctional coupler and a particular polyfunctional developing agent.

Abstract: An exposed light-sensitive silver halide photographic material containing a coupler is processed with a developing bath and thereafter with an amplifying bath containing hydrogen peroxide, said process being characterized in that a compound acting on the silver halide at the unexposed portion of the photographic material is incorporated into the developing bath or into a bath used for a treatment effected after the development and before processing with the amplifying bath.

Abstract: An improved method for processing an imagewise exposed light-sensitive silver halide photographic material containing a coupler is described, wherein the siliver halide photographic material is processed with a developing bath and thereafter processed, in the presence of imagewise developed silver and a color developing agent, with a solution containing hydrogen peroxide, whereby, after the development, the developed light-sensitive silver halide photographic material is processed with a solution containing a deactivating agent or a silver halide solvent, and thereafter subjecting the thus processed light-sensitive silver halide photographic material to spraying with and/or intermittent dipping in said solution containing hydrogen peroxide.

Abstract: A process for forming yellow image in a light-sensitive silver halide photographic material which uses as a yellow image-forming a coupler a compound of the formula ##STR1## wherein A is a yellow image-forming coupler residue having an active methylene group; ##STR2## is a group which has been substituted for one hydrogen atom of the active methylene group in said coupler residue A; and Z is a group selected from alkylene, alkenylene, cycloalkylene, cycloalkenylene, terphenylene, arylene and pyridine-diyl groups.

Abstract: An imagewise-exposed, light-sensitive silver halide color photographic material is developed, by use of developer, in the presence of a compound of the general formula: ##EQU1## wherein A is a residue formed by removing one of the hydrogen atoms of the active methylene group of an active methylene group-containing yellow image-forming coupler of the acyl acetanilide type; X is a hydrogen atom, or an alkyl, acyl, carboxymethyl, alkoxycarbonylmethyl, carbamylmethyl, aryl, aralkyl, nitro or amino group; and Y and Z are individually a hydrogen atom, or an alkyl, ureido, aryl, aralkyl, benzylidene, styryl, or anilino group.