Abstract: A toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and an external additive attached to a surface of the toner mother particle. The external additive includes fluorine-containing particles. The fluorine-containing particles include a fluorine atom at least in surface layers thereof. The amount of the fluorine-containing particles is at least 0.10 parts by mass and no greater than 0.50 parts by mass relative to 100 parts by mass of the toner mother particles. When ultrasonication is performed, a residual amount ratio of remaining fluorine-containing particles is at least 0% by mass and no greater than 20% by mass relative to the amount of the fluorine-containing particles attached to the toner mother particles before the ultrasonication.

Abstract: An electrostatic charge image developing toner includes a toner particle containing a binder resin, a release agent, a divalent metal, and a trivalent metal, in which the release agent has a domain diameter of 0.5 ?m or greater and 1.5 ?m or less.

Abstract: Here is described a liquid electrostatic ink composition comprising a pigment; a carrier liquid; a resin; a charge director; a fatty acid amide, and a polyalkylene wax. Methods of forming the liquid electrostatic ink compositions, and plastic substrates with the liquid electrostatic ink composition printed thereon, are also disclosed.

Abstract: A toner including a toner particle containing a binder resin and an ester compound, wherein the binder resin contains a styrene-acrylic-based resin, the styrene-acrylic-based resin contains a specific unit, the ester compound has a specific structure, and a molar ratio of the specific unit to the ester compound is 0.5 to 1.5.

Abstract: Provided are an electrophotographic photoconductor that is less likely to cause transfer ghosting even when mounted in an electrophotographic apparatus with high transfer voltage set for high-speed or cleanerless processes, as well as a method of manufacturing the electrophotographic photoconductor, and an electrophotographic apparatus. The electrophotographic photoconductor includes a conductive substrate; an undercoat layer provided on the conductive substrate, and a photosensitive layer provided on the undercoat layer. In the electrophotographic photoconductor, the undercoat layer contains a resin binder and a first filler; and the first filler contains zinc oxide particles that are surface-treated with an N-acylated amino acid or an N-acylated amino acid salt.

Abstract: The present invention relates to a ferrite particle, containing a crystal phase component containing a perovskite crystal represented by the compositional formula: RZrO3 (provided that R represents an alkaline earth metal element), and having an apparent density in a range represented by the following formula: 1.90?Y?2.45 provided that Y in the formula is the apparent density (g/cm3) of the ferrite particle.

Abstract: The present invention relates to an electrophotographic photoreceptor having a plurality of layers containing at least one outermost layer, wherein at least one of the outermost layer contains a polymer having a first structure where at least one carbonyl group is bonded to an aromatic group and a second structure represented by Formula (A).

Abstract: A toner comprising a toner particle and a silica particle on a surface of the toner particle, wherein an area formed by a polyester resin and an area formed by a styrene-acrylic resin are present on the surface of the toner particle; the silica particle has the number-average particle diameter of 15 to 60 nm; the silica particle has the average pore diameter of 5.0 to 20.0 nm; and the silica particle has the total pore volume of 0.20 to 1.50 cm3/g.

Abstract: A process cartridge includes a photosensitive member, a toner, and a developing roller, a surface layer of the photosensitive member has a Martens hardness of 245 to 300 N/mm2, the developing roller has a single-layered surface layer containing a substrate and a binder resin; when an elastic modulus of the binder resin in a first region is E1, and an elastic modulus of the binder resin in a second region is E2, E1?200 MPa and 10 MPa?E2?150 MPa are satisfied; the elastic modulus in the second region continuously decreases from that in the first region; the toner comprises a toner particle and an external additive A; the external additive A is a silica particle having a major diameter of 40 to 400 nm; and a coverage of the external additive A with respect to surface of the toner particle is 5.0% or more.

Abstract: A resin binder composition for toners, containing a polyester resin A having a constituting unit derived from an alcohol component containing an alkylene oxide adduct of bisphenol A and a constituting unit derived from a carboxylic acid component containing an amorphous acid modified product A of an ?-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; a resin binder composition for toners containing a polyester resin A which is a polycondensate of an alcohol component containing an alkylene oxide adduct of bisphenol A and a carboxylic acid component containing an amorphous acid modified product A of an ?-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; and a toner for electrostatic image development, containing these resin binder composition for toners.

Abstract: A fine particle of a silicon polymer having a siloxane group and a silanol group, wherein a moisture adsorption amount of the fine particle at a temperature of 30° C. and a humidity of 80% RH is from 1.0 mg/g to 22.0 mg/g, an amount of the silanol group of the fine particle measured by a titration method using KOH is from 0.012 mmol/g to 0.120 mmol/g, and a number average particle diameter of primary particle of the fine particle is from 0.05 ?m to 0.30 ?m.

Abstract: A toner based on fly-ash rich carbon and method of producing are disclosed. The process includes preparing a latex and preparing a pigment including fly ash, where the fly ash has been ground to nanoparticle size. The latex, pigment including fly ash, and polyethylene wax are combined in an emulsion aggregation process. The latex is formed by a mixing process including combining ammonium bicarbonate, sodium dodecylbenzene sulfonate, styrene, acrylic acid, and methyl methacrylate. The emulsion aggregation process includes steps of dispersing a mixture of the polyethylene wax, pigment including fly ash, and latex in water, adding zinc oxide, nitric acid, adding Ethylenediaminetetraacetic acid (EDTA), elevating the temperature, neutralizing the product mixture with NaOH solution and cooling the mixture, Centrifuging, washing and drying are performed to achieve a finished toner which includes fly ash pigment, polyethylene wax, poly(styrene-methyl methacrylate-acrylic acid) latex, zinc oxide and a chelating agent.

Abstract: The present invention relates to a carrier including: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material, in which the resin coating layer contains a binder resin, and fluorine element-containing resin particles dispersed in the binder resin, the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/?m2 or more and 350 particles/?m2 or less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less.

Abstract: An electrostatic charge image developing toner includes a toner particle that contains a binder resin having an acid value of 5 mgKOH/g or more and 25 mgKOH/g or less, and a pigment having an isoindoline skeleton, in which a total Net intensity NA of an alkali metal and an alkaline earth metal, which is measured by fluorescent X-ray analysis, in the toner particle is 1.50 kcps or more and 4.00 kcps or less.

Abstract: An electrostatic charge image developing carrier, contains: a magnetic particle; and a coating resin layer coating the magnetic particle and containing inorganic particles, in which an area ratio of the inorganic particles that is a ratio of a total area of the inorganic particles to an area of the coating resin layer in a cut surface of the coating resin layer along a thickness direction of the coating resin layer is 10% or more and 50% or less.

Abstract: An electrostatic charge image developing toner includes: toner base particles containing a binder resin and a metal pigment; and an external additive containing lanthanum-containing strontium titanate particles.

Abstract: An electrostatic charge image developing carrier includes a magnetic particle and a coating resin layer that covers the magnetic particle and contains a silica particle, and a ratio of Si on a surface of the coating resin layer, determined by an X-ray photoelectron spectroscopy (XPS), is 6 atom % or more and 12 atom % or less.

Abstract: A magnetic carrier including a magnetic core and a coating resin configured to coat the surface of the magnetic core. The coating resin contains a graft resin A and a graft resin B. The coating resin (i) contains 1.0 mass % or more and 50.0 mass % or less of the graft resin A, and (ii) contains 50.0 mass % or more and 99.0 mass % or less of the graft resin B. The graft resin A has a unit Y1 represented by formula (1) and a unit Y2 represented by formula (2). The graft resin B (i) is a comb-shaped polymer having, as a branch, at least one moiety selected from, for example, a styrene-based polymer moiety and a (meth)acrylate-based polymer moiety, and (ii) contains the polysiloxane structure moiety at a content of 0.1 mass % or less.

Abstract: A toner comprises a toner particle comprising a core particle comprising a resin component, a shell coating the surface of the core particle, and a polyvalent metal. The resin component comprises a polyester resin, and the shell comprises an amino resin; in an electron image of a cross section of the toner acquired using a transmission electron microscope, a polyvalent metal content P(M) obtained by energy-dispersive x-ray analysis at the core/shell interface and in the vicinity of this interface is 0.0010 to 2.00 atomic %; and the surface storage elastic modulus of the toner at a load of 30 ?N at 25° C., according to nanoindentation measurement of the toner, is from 6.50 GPa to 12.00 GPa.

Abstract: Provided is an electrophotographic member that includes a surface with excellent abrasion resistance and allows toner to have an increased charge amount, thereby eliciting uniform and high transfer efficiency. This electrophotographic member is provided with a surface layer including at least one of an acrylic resin and methacrylic resin, the surface layer further including a positively chargeable charge control agent, wherein a surface of the surface layer is free from a convex portion having a height of more than 15 ?m resulting from the charge control agent.