Abstract: Ink receiving particles is provided. The ink receiving particles includes polymer particles, the polymer particles including a resin including an acidic group and a polyoxyethylene chain, the acidic group at least partially having a salt structure.

Abstract: A liquid developer includes: an aqueous medium; and a magnetic toner which is substantially dispersed in the aqueous medium and includes a polymer compound and a magnetic powder, the amount of the magnetic powder being from about 0.2 volume % to about 5 volume % with respect to the magnetic toner.

Abstract: A liquid developer includes: magnetic polymer particles including a magnetic material containing yttrium iron garnet (YIG), a polymer compound having a carboxylate salt structure, and a colorant; and a dispersion medium in which the magnetic polymer particles are dispersed.

Abstract: The present invention provides a particle dispersion liquid including (meth)acrylic resin-containing hydrophobic particles, an acetylene glycol surfactant adsorbed to the hydrophobic particles, and water; the particle size, in a state of being swollen due to absorbing water until saturation, of the hydrophobic particles to which the acetylene glycol surfactant has been adsorbed being 1.1 to 2 times as large as the particle size of the hydrophobic particles in a dried state.

Abstract: Ink receiving particles is provided. The ink receiving particles includes polymer particles, the polymer particles including a resin including an acidic group and a polyoxyethylene chain, the acidic group at least partially having a salt structure.

Abstract: A liquid developer includes: an aqueous medium; and a magnetic toner which is substantially dispersed in the aqueous medium and includes a polymer compound and a magnetic powder, the amount of the magnetic powder being from about 0.2 volume % to about 5 volume % with respect to the magnetic toner.

Abstract: A developer supply device, includes: a developer holder; and a developer reservoir which is disposed inside of the developer holder, holds a liquid developer, and has at least one supply section that supplies the liquid developer from the developer reservoir to the developer holder, the liquid developer including a toner and an aqueous medium, and the developer supply device supplying the liquid developer that has been supplied to the developer holder to a medium which is a supply target for the liquid developer.

Abstract: An image forming device contains: a latent image holding member; a latent image forming unit; a developer storage unit that stores a liquid developer including a toner and an aqueous medium; a developer supply member that supplies the liquid developer to a latent image holding member; and a transfer unit that transfers a toner image to a recording medium. The developer supply member has a surface formed of a liquid absorbent member and is disposed such that a part of the liquid absorbent member is immersed in the liquid developer stored in the liquid developer storage unit and that another part of the liquid absorbent member is in contact with and compressed by the latent image holding member. The water repellency of the surface of the latent image holding member is higher than the water repellency of the surface of the developer supply member.

Abstract: The present invention provides a magnetic latent image holding body in which the surface thereof has water repellency and a magnetic latent image is visualized by a liquid developer that contains a magnetic toner and an aqueous medium.

Abstract: A charge transporting block and an insulating block are block copolymerized or graft copolymerized to form a charge transporting copolymer. The charge transporting polymers may be used in an electrophotographic photoreceptor and an electrophotographic device.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate having thereon a charge-generating layer and a charge-transporting layer, wherein the charge-transporting layer comprises: a nonuniform charge-transporting layer comprising an electrically inactive matrix and a charge-transporting domain dispersed in the matrix; and the uniform charge-transporting layer comprising a charge-transporting matrix.

Abstract: An electrophotographic photosensitive element having S-type photo-induced potential decay characteristics and an electrophotographic apparatus using the photosensitive member are provided.The photosensitive member comprises a charge generation layer and a charge transport layer on an electroconductive substrate. The charge transport layer contains a polymer in a phase separated state with a modulated structure, comprising an electrically inactive phase and a charge transporting phase. The amount of exposure required for 50% potential decay is less than 5 times the exposure amount required for 10% potential decay. The modulated structure includes, for example, a mixture of insulating polymer and charge transporting polymer and the like. The modulated structure can be formed by the method of separating a homogeneous phase of these polymers into two phases.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate having thereon a charge-generating layer and a charge-transporting layer, wherein the charge-transporting layer comprises: a nonuniform charge-transporting layer comprising an electrically inactive matrix and a charge-transporting domain dispersed in the matrix; and the uniform charge-transporting layer comprising a charge-transporting matrix.

Abstract: An excellent electrographic photosensitive member having a high sensitivity, a high chargeability and a low residual potential. The electrographic photosensitive member comprises a photosensitive layer, or a photosensitive layer and an underlayer superimposed over an electroconductive support, wherein the photosensitive layer and/or the underlayer contain a chlorogallium phthalocyanine which is substituted with an electron-withdrawing group and has the following formula: ##STR1## where X represents an electron-withdrawing group such as a halogen atom and n is an integer of 2 to 4.

Abstract: A hydroxygallium phthalocyanine crystal, having distinct diffraction peaks at Bragg angles (20+/-0.2.degree.) of 7.0.degree., 13.4.degree., 16.6.degree., 26.0.degree. and 26.7.degree. to CuK.alpha. characteristic X-ray in X-ray diffraction spectrum; a process for preparing the hydroxygallium phthalocyanine crystal; and a electrophotographic photoreceptor comprising the hydroxygallium phthalocyanine crystal.

Abstract: A charge-transporting polymer which is excellent in solubility and film-forming property and usable in producing various organic electron devices and whose ionization potential is controllable, and an organic electronic device, in particular electrophotographic photoreceptor, containing the same are disclosed; the charge-transporting polymer being represented by formula (I-1) or (I-2) ##STR1## wherein Y represents a divalent hydrocarbon group; Z represents a divalent hydrocarbon group; A represents a group represented by formula (II) ##STR2## (wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, an alkoxy group, a substituted or unsubstituted aryl group, a substituted amino group, or a halogen atom, X represents a substituted or unsubstituted divalent aryl group, n represents an integer of 1 to 5, and k is 0 or 1); B represents a group represented by --O--(Y--O).sub.m --H or --O--(Y--O).sub.

Abstract: A triarylamine compound useful as a charge transport material of an electrophotographic photoreceptor, which represented by formula (I) ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents a phenyl group or a condensed ring group.

Abstract: A method for preparing hydroxygallium phthalocyanine crystals wherein hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.0.degree., 13.4.degree., 16.6.degree., 26.0.degree. and 26.7.degree. of the Bragg angle (2.theta..+-.0.2.degree.) with respect to CuK.alpha. characteristics X-ray in the X-ray diffraction spectrum are crystal-transferred by solvent treatment. The crystals after crystal-transfer have distinct diffraction peaks at (i) 7.7.degree., 16.5.degree., 25.1.degree. and 26.6.degree., (ii) 7.9.degree., 16.5.degree., 24.4.degree. and 27.6.degree., (iii) 7.0.degree., 7.5.degree., 10.5.degree., 11.7.degree., 12.7.degree., 17.3.degree., 18.1.degree., 24.5.degree., 26.2.degree. and 27.1, (iv) 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.8.degree. or (v) 6.8.degree., 12.8.degree., 15.8.degree. and 26.0.degree. of the Bragg angle (2.theta..+-.0.2.degree. C.) with respect to CuK.alpha. characteristics X-ray in the X-ray diffraction spectrum.

Abstract: A methoxy gallium phthalocyanine compound represented by formula (I): ##STR1## wherein X represents a chlorine atom, a bromine atom, or an iodine atom; and n represents an integer of from 0 to 4; and an electrophotographic photoreceptor using the methoxy gallium phthalocyanine compound.

Abstract: A hydroxygallium phthalocyanine crystal, having distinct diffraction peaks at Bragg angles (2.theta.+/-0.2.degree.) of 7.0.degree., 13.4.degree., 16.6.degree., 26.0.degree. and 26.7.degree. to CuK.alpha. characteristic X-ray-in X-ray diffraction spectrum; a process for preparing the hydroxygallium phthalocyanine crystal; and a electrophotographic photoreceptor comprising the hydroxygallium phthalocyanine crystal.