Abstract: A toner for developing an electrostatic latent image comprising a binder resin, a coloring agent, a compound selected from a group consisting of silica and a hydrophobic aluminum oxide or a hydrophobic titanium oxide.

Abstract: In a process for forming an image comprising;(i) forming a latent image on a latent image bearing member comprising an organic photoconductive photosensitive member;(ii) forming a magnetic brush with a two-component developer comprising a toner and a carrier on a developer carrying member arranged as opposed to said latent image bearing member; and(iii) developing said latent image by brushing it with said magnetic brush in developing region;the improvement wherein said latent image bearing member and said developer carrying member move in the same direction in the developing region, and the ratio V.sub.S /V.sub.P of the linear velocity of said developer carrying member V.sub.S to the linear velocity of said latent image bearing member V.sub.P is within the range of 1.9.ltoreq.V.sub.S /V.sub.P .ltoreq.4.According to this process, an image which is free from fog, yet high in image density and stable for repeated copying can be obtained.

Abstract: In a process for forming an image comprising;(i) forming a latent image on a latent image bearing member comprising an organic photoconductive photosensitive member;(ii) forming a magnetic brush with a two-component developer comprising a toner and a carrier on a developer conveying support arranged as opposed to the latent image bearing member; and(iii) developing the latent image by brushing it with the magnetic brush in a developing region;the improvement wherein an absolute value of a maximum potential (V) of a charge for forming the latent image is from 400 to 700, a minimum value of a gap between the photosensitive member and the developer conveying support is from 0.30 to 0.65 mm, the carrier comprises a core material and a polymer comprising a monomer component represented by the followng formula (I), (II) or (III): ##STR1## wherein R.sup.1 and R.sup.2 each represent a hydrogen atom or a methyl group; each of n and p represents an integer of 1 to 8; each of m and q represents an integer of 1 to 19; X.

Abstract: 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:(a) agents which are capable of enhancing the elasticity of toner material,(b) polyhydric alcohols,(c) polyvalent amines and(d) polyvalent carboxylic acids.

Abstract: There is disclosed a toner for development of electrostatic image which comprises a binder resin selected from the group consisting of a polyester resin, a vinyl polymer, a styrene-butadiene copolymer, a styrene polymer, a styrene-containing copolymer and a polymer containing a reactive prepolymer; and a wax comprising a polyolefin.The toner of the present invention has excellent non-offset properties and a very low minimum fixing temperature, has high fluidity and has excellent developing and transfer properties.

Abstract: Photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer thereon, said photosensitive layer containing at least one azo compound of Formula I or II ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3 and Ar.sub.4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is an electron attractive group or hydrogen provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is an electron attractive group; and A is ##STR2## wherein X is a hydroxy group or a group represented by the formula: ##STR3## wherein R.sub.6 and R.sub.7 each is hydrogen or an alkyl group, and R.sub.8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R.sub.

Abstract: In a method for the formation of images such as an electrophotographic method in which toners are used, when a heat roller is used for fixing toner images, the durability and the heat efficiency of the heat roller is improved reducing the wall thickness of the cylindrical metal of the heat roller, shortening the warming-up time, using a material having a substantial Young's modulus, and by shortening the outer diameter of the cylindrical metal, respectively.With respect to toners specifically used for the above, stains on an image carrier are prevented by making use of a binder that is fused at a heating temperature of the heat-fixing roller and is increased in the elasticity of the toner at the same temperature or higher. Such binders may be obtained by copolymerizing a polyhydric alcohol and/or a polyhydric amine, and a polyhydric carboxylic acid.

Abstract: An electrophotograhic photoreceptor that has great ability to generate carriers and which has high sensitivity but low residual potential is disclosed. This photoreceptor is characterized by having formed on an electrically conductive support a light-sensitive layer containing a bisazo compound of the following formula: ##STR1## (wherein R.sub.1 is a cyano group, a chlorine atom or a bromine atom; X.sub.1 is a halogen atom, an alkyl group, an alkoxy group or a cyano group; X.sub.2 is a hydrogen atom, a halogen atom, an alkyl atom or an alkoxy group; A is ##STR2## wherein Y is a substituted or unsubstituted carbamoyl group or a substituted or unsubstituted sulfamoyl group; Z is an atomic group necessary for forming a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted heteroaromatic ring; R.sub.

Abstract: There is disclosed an electrophotosensitive receptor which comprises a conductive support and an electrophotosensitive layer which comprises a carrier transporting material and a specified trisazo compound wherein the azo compound is applied as a coating solution containing a solvent or as a liquid dispersion mixture containing a dispersion medium. Alternatively, the electrophotosensitive receptor comprises a conductive support and an electrophotosensitive layer which comprises said azo compound wherein the azo compound is applied as a coating solution containing a solvent and a binder or as a liquid dispersion medium containing a dispersion medium and a binder.

Abstract: A method for the formation of a color photographic image comprising exposure and development of a photographic element, said photographic element comprising at least one silver halide emulsion layer, a compound capable of releasing a diffusible azo dye compound during development, and at least one mordant layer arranged on a support. The color image formation is effected by the reaction of multivalent metallic ions with an azo dye compound having the formula: ##STR1## wherein G.sup.1 is an alkoxy or a thioalkoxy metallic chelating group; G.sup.2 is a metallic chelating group in which an oxygen atom is involved in the chelate formation; and Z.sup.1 and Z.sup.2 each is a group of atoms necessary to form an aromatic carbocyclic ring or a heterocyclic ring. The azo dye compound and the metallic ions form a metal complex by coordination of the azo group and the G.sup.1 and G.sup.2 groups of the azo dye compound with the multivalent metallic ions.

Abstract: A photographic element containing a nondiffusible metal complex capable of releasing a diffusible photographically useful group. The complex contains at least one poly-dentate ligand which contains the photographically useful group. The complex may be activated when reduced under alkaline conditions to release the photographically useful group.

Abstract: A photographic light-sensitive element for a color diffusion transfer process which has a silver halide emulsion layer and also employs a nondiffusible cyan dye releasing compound. The compound is capable of releasing a diffusible metallic complex which forms an azo dye under alkaline conditions as a function of the development of the silver halide in said silver halide emulsion layer.

Abstract: A photographic light-sensitive element which comprises on a support a light-sensitive silver halide emulsion layer and having associated therewith a non-diffusible compound capable of, under alkaline condition, releasing a diffusible azo dye, said compound having the formula (1), ##STR1## wherein X represents a group of atoms necessary to complete a naphthalene ring or a benzene ring, G.sup.1 represents a hydroxy group, a salt thereof or a hydrolyzable precursor thereof, G.sup.2 represents a carboxy group, a salt thereof or a hydrolyzable precursor thereof, a hydroxy group, a salt thereof or a hydrolyzable precursor thereof, R.sup.1 is a hydrogen atom, an alkyl group or an aryl group, R.sup.2 is a hydrogen atom, an alkyl group or an aryl group, R.sup.2 represents a hydrogen atom, a halogen atom, an alkyl group, a carboxy group, a carbamoyl group or an amino group, each of which group may be substituted, R.sup.

Abstract: A light-sensitive photographic element comprising a support and at least one light-sensitive silver halide emulsion layer coated thereon having associated therewith a magenta image dye-providing compound which releases a magenta dye or a precursor thereof corresponding to the imagewise exposure of said emulsion layer, said magenta dye-providing compound being a compound represented by formula [I]: ##STR1## wherein Car represents a carrier moiety which can be oxidized under alkaline conditions to release a diffusible dye or a precursor thereof from said compound;R.sup.1 and R.sup.2, which may be the same or different, independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms (provided that the total sum of carbon atoms in R.sup.1 and R.sup.2 does not exceed 5), or R.sup.1 and R.sup.

Abstract: A light-sensitive photographic element comprising a support and at least one light-sensitive silver halide emulsion layer coated thereon having associated therewith a cyan image dye-providing compound which releases a cyan dye or a precursor thereof corresponding to the imagewise exposure of said emulsion layer, said cyan image dye-providing compound being a compound represented by formula [I] or [II]: ##STR1## wherein Car, R.sup.1, R.sup.2, X, Y.sup.1, Y.sup.2, m, J.sup.1 and J.sup.2 are defined in the specification and claims.

Abstract: 2-Sulfamoyl-5-sulfamido-1-naphthols represented by the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be the same or different and each represent a hydrogen atom, a straight-chain alkyl group, a branched alkyl group or a cycloalkyl group; or R.sup.1 and R.sup.

Abstract: A novel color diffusion transfer photographic element is disclosed which is characterized as having a photosensitive element containing a compound represented by the formula ##STR1## wherein A represents oxygen or a group of the formula .dbd.NR (in which R represents hydroxyl or an amino group); X represents hydrogen or halogen; Z represents a group of nonmetallic atoms necessary to form a first ring and being a 5 to 7-membered nonaromatic hydrocarbon ring which may be fused with a second ring, at least one of said first ring and said second ring having one or more substituents wherein at least one of said substituents is a ballast group which renders said compound nondiffusible during processing with said solution; J represents a divalent group; D represents a dye moiety or a dye precursor moiety; and n represents zero or 1.

Abstract: The present invention discloses a process for forming a color dye image in an image receiving layer by diffusion transfer from a light sensitive element containing a diffusible dye developer and a silver halide emulsion which has been imagewise exposed. The exposed light sensitive element is subjected to an alkaline processing solution to transfer the dye developer to an image-receiving layer of an image receiving element to produce a color dye image. The alkaline processing solution thus used should contain a compound of the following general formula: ##STR1## wherein R.sub.1 represents hydrogen, methyl, ethyl, methoxy or hydroxymethyl and R.sub.2 represents hydrogen, methyl or ethyl.

Abstract: An improved process for forming a dye image in an image receiving layer of a film unit containing a light-sensitive element and an image receiving element by incorporation therein of a compound represented by the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 individually represent lower alkyl, and n is 3.