Abstract: A carrier for electrostatic image development includes: a core material; and a resin coating layer that covers the core material and contains a resin and carbon black particles. The resin coating layer has an average thickness denoted as B ?m and contains aggregates of the carbon black particles, the aggregates having equivalent circle diameters denoted as A ?m, the aggregates satisfying formula (1) below. In a cross section of the resin coating layer, the ratio of the total area of the aggregates satisfying formula (1) below to the total area of the resin coating layer is 10% or more and 50% or less: 0.2×B?A?0.8×B.

Abstract: A carrier for electrostatic image development includes magnetic particles having internal pores, and a resin composition disposed in at least some of the internal pores and containing a resin and inorganic particles including at least one selected from the group consisting of silica, alumina, and calcium carbonate.

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 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: An electrostatic charge image developer containing: a toner containing a toner particle and an external additive; and a carrier containing a magnetic particle and a resin layer covering the magnetic particle, in which the toner particle has a surface property index value of 2.0 or more and 2.8 or less; and the carrier has a surface having a ratio B/A of a surface area B to a planar view area A of 1.020 or more and 1.100 or less, the planar view area A and the surface area B being obtained by three-dimensional analysis of the surface of the carrier.

Abstract: An electrostatic charge image developer contains: a toner containing a toner particle and an external additive; and a carrier containing a magnetic particle and a resin layer covering the magnetic particle; and the toner particle has a surface property index value of 1.0 or more and less than 2.0; and the carrier has a surface having a ratio B/A of a surface area B to a plane view area A of 1.020 or more and 1.100 or less, the plane view area A and the surface area B being obtained by three-dimensional analysis of the surface of the carrier.

Abstract: An electrostatic charge image developer contains a toner including toner particles that contain a binder resin and a carrier including magnetic particles and a resin layer that adheres to a surface of the magnetic particles, in which, in a dynamic viscoelasticity measurement of the toner, in a case where a loss tangent tan? at a temperature of 90° C. and a strain of 1% is represented by D1 (90), a loss tangent tan? at a temperature of 90° C. and a strain of 50% is represented by D50 (90), a loss tangent tan? at a temperature of 150° C. and a strain of 1% is represented by D1 (150), and a loss tangent tan? at a temperature of 150° C. and a strain of 50% is represented by D50 (150), each of D1 (90), D50 (90), D1 (150), and D50 (150) is 0.5 or more and 2.5 or less, a value of D50 (150)?D1 (150) is less than 1.5, and a value of D50 (90)?D1 (90) is less than 1.0, and in the surface of the magnetic particles, an average unevenness interval Sm and an arithmetic mean roughness Ra satisfy 0.5 ?m? Sm?2.5 ?m and 0.

Abstract: An electrostatic charge image developer contains a toner including toner particles that contain a binder resin, and an external additive, and a carrier having a true specific gravity of 3.0 g/cm3 or more and 4.0 g/cm3 or less, in which, in a dynamic viscoelasticity measurement of the toner, in a case where a loss tangent tan ? at a temperature of 90° C. and a strain of 1% is represented by D1 (90), a loss tangent tan ? at a temperature of 90° C. and a strain of 50% is represented by D50 (90), a loss tangent tan ? at a temperature of 150° C. and a strain of 1% is represented by D1 (150), and a loss tangent tan ? at a temperature of 150° C. and a strain of 50% is represented by D50 (150), each of D1 (90), D50 (90), D1 (150), and D50 (150) is 0.5 or more and 2.5 or less, a value of D50 (150)?D1 (150) is less than 1.5, and a value of D50 (90)?D1 (90) is less than 1.0.

Abstract: An electrostatic charge image developing carrier contains a magnetic particle and a resin coating layer coating the magnetic particle, in which the resin coating layer contains inorganic particles, a ratio B/A of a surface area B of the carrier to a plan view area A of the carrier that are obtained by three-dimensional analysis of a surface of the carrier is 1.020 or more and 1.100 or less, a volume average particle diameter of the magnetic particle is 25 ?m or more and 34 ?m or less, and a fluidity of the magnetic particle is 28 s/50 g or more and 36 s/50 g or less.

Abstract: An electrostatic image developer includes: a toner A to which silica particles (A) containing an elemental nitrogen-containing compound containing elemental molybdenum are externally added; and a carrier B including a core material and a coating resin layer that covers the core material and contains inorganic particles. In the silica particles (A), the ratio NMo/NSi of a Net intensity NMo of elemental molybdenum that is measured by X-ray fluorescence analysis to a Net intensity NSi of elemental silicon that is measured by the X-ray fluorescence analysis is from 0.035 to 0.45 inclusive.

Abstract: An electrostatic charge image developer includes: a toner A incorporating toner particles and silica particles (A) as an external additive, the toner particles containing a binder resin and resin particles, and the silica particles (A) containing a nitrogen-containing compound containing the element molybdenum; and a carrier B incorporating a core and a coating resin layer, the coating resin layer covering the core and containing inorganic particles, and the ratio NMo/NSi is 0.035 or greater and 0.45 or less, where NMo and NSi are measured net intensities for the element molybdenum and the element silicon, respectively, in the silica particles (A) in x-ray fluorescence analysis.

Abstract: An electrostatic image developer includes a toner including toner particles that include a binder resin and a release agent and have an exposure ratio of the release agent of 15% or more and 30% or less, and a carrier including magnetic particles and resin cover layers covering the magnetic particles and including inorganic particles, wherein the inorganic particles have an arithmetic average particle size of 5 nm or more and 90 nm or less, the resin cover layers have an average thickness of 0.6 ?m or more and 1.4 ?m or less, and a fine-irregularity-structure surface roughness of surfaces of the carrier three-dimensionally analyzed has, in an analysis region, a ratio B/A of an irregularity-surface area B to a plan-view area A of 1.020 or more and 1.100 or less.

Abstract: An electrostatic charge image developing carrier includes a core material and a resin coating layer that contains strontium titanate particles and coats the core material, in which a content of the strontium titanate particles is 10% by mass or more and 55% by mass or less with respect to a total mass of the resin coating layer, and a proportion of strontium atoms within a surface of the resin coating layer, the proportion being determined by X-ray photoelectron spectroscopy, is 0.2 at % or more and 1.0 at % or less.

Abstract: A carrier for developing an electrostatic charge image includes magnetic particles and a resin coating layer covering the magnetic particles, the resin coating layer containing inorganic particles. The ratio M1/M2 is 0.8 or more and 1.2 or less, where M1 is the concentration of the inorganic particles in the resin coating layer within a distance of 300 nm from the carrier surface, and M2 is that within a distance of 300 nm from the surface of the resin coating layer closer to the magnetic particle, and the percentage surface exposure of the magnetic particles is 0% by area or more and 5% by area or less. A cavity lies at least in part between the resin coating layer and a surface of the magnetic particles, and the average width, or the average length parallel to the thickness of the resin coating layer, of the cavity is 50 nm or more and 500 nm or less.

Abstract: A carrier for electrostatic image development includes: a core material; and a resin coating layer that contains nitrogen-containing silica particles and nitrogen-containing resin fine particles and covers the core material. The content of the nitrogen-containing silica particles is from 10% by mass to 55% by mass inclusive based on the total mass of the resin coating layer. The nitrogen-containing resin fine particles have a volume average particle diameter of from 100 nm to 250 nm inclusive. The mass ratio P/S of the mass P of the nitrogen-containing resin fine particles to the mass S of the nitrogen-containing silica particles is from 0.15 to 0.55 inclusive.

Abstract: An electrostatic charge image developer contains toner particles, silica particles that are added to an exterior of the toner particles and contain a nitrogen element-containing compound, and a carrier that has a core material and a nitrogen element-containing coating resin layer, in which a content of the nitrogen element-containing compound with respect to the silica particles is 0.005% by mass or more and 0.5% by mass or less in terms of a nitrogen element, and in a case where A represents a pore volume of pores that the silica particles include and have a diameter of 1 nm or more and 50 nm or less, which is determined from a pore size distribution curve obtained by a nitrogen adsorption method before baking of the silica particles at 350° C.

Abstract: A method for producing a carrier for developing an electrostatic charge image, the method includes: adding a coating liquid containing a resin, conductive particles, and a solvent and magnetic particles to a mixer having a stirring blade, and mixing the coating liquid and the magnetic particles to obtain a mixture; and evaporating and drying the solvent from the mixture to produce a carrier having a resin coating layer on surfaces of the magnetic particles, wherein a viscosity ? of the coating liquid when being added to the mixer is more than 60 mPa·s and 1,000 mPa·s or less, and a value of a ratio ?/W of the viscosity ?(mPa·s) to an amount W (parts by mass) of the resin coating layer with respect to 100 parts by mass of the magnetic particles in the carrier is 20 or more and 500 or less.

Abstract: A carrier for developing an electrostatic charge image includes magnetic particles and a resin coating layer covering the magnetic particles, the resin coating layer containing aggregates of inorganic particles. The arithmetic mean diameter of the aggregates of inorganic particles on the carrier surface is 30 nm or more and 150 nm or less, and the percentage surface exposure of the magnetic particles is 0% by area or more and 5% by area or less.

Abstract: An electrostatic charge image developing carrier includes: magnetic particles; and a resin layer coating the magnetic particles and containing inorganic particles, in which an average particle diameter of the inorganic particles is 5 nm or more and 90 nm or less, an average thickness of the resin layer is 0.6 ?m or more and 1.4 ?m or less, and a ratio B/A of a surface area B of the electrostatic charge image developing carrier to a plan view area A of the electrostatic charge image developing carrier is 1.020 or more and 1.100 or less when a surface of the electrostatic charge image developing carrier is three-dimensionally analyzed.

Abstract: A carrier for developing an electrostatic charge image includes magnetic particles and a coating layer covering the magnetic particles, the coating layer containing a resin and inorganic particles. The percentage exposure of the magnetic particles on the surface is 50% or more and 80% or less, and the mean width RSm and the maximum height Rz of the roughness profile on the surface are 0.9 ?m or more and 1.5 ?m or less and 2.0 ?m or more and 6.0 ?m or less, respectively.