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 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 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 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 developing toner contains alkylsilane-treated silica particles, cyclic siloxane, and toner particles.

Abstract: An electrostatic charge image developing toner contains alkylsilane-treated silica particles, a linear aliphatic hydrocarbon having 10 or more and 18 or less carbon atoms, and toner particles.

Abstract: An electrostatic charge image developing toner contains alkylsilane-treated silica particles, a branched aliphatic hydrocarbon having 7 or more and 18 or less carbon atoms, and toner particles.

Abstract: An electrostatic charge image developing toner contains toner particles, titanic acid compound particles that are added to an exterior of the toner particles, have a peak existing in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve, and have an average circularity of 0.88 or more and 0.

Abstract: A toner for developing an electrostatic charge image includes toner particles having an average circularity Cc of 0.80 or more and less than 0.98, and an external additive containing monodisperse silica particles and titanate compound particles, in which a ratio Rt/Rs of an average primary particle diameter Rt of the titanate compound particles to an average primary particle diameter Rs of the monodisperse silica particles is 0.50 or more and 3.50 or less, and a ratio A/B of an external additive coverage A (%) of the monodisperse silica particles on surfaces of the toner particles to an external additive coverage B (%) of the titanate compound particles on the surfaces of the toner particles satisfies formula (1): 0<A/B?2.00.

Abstract: An electrostatic charge image developing toner contains toner particles, silica particles that are added to an exterior of the toner particles, and titanic acid compound particles that are added to the exterior of the toner particles and have an average circularity of 0.890 or more and 0.950 or less, in which the silica particles include particles having a primary particle size of 80 nm or less, the particles having a primary particle size of 80 nm or less have at least one peak in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve (hereinafter, silica particles having such a peak will be called “specific silica particles”), the titanic acid compound particles have at least one peak in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve, a difference between an average circularity of the specific silica particles and the average circularity of the titanic acid compound particles is 0.

Abstract: A toner for developing an electrostatic charge image contains toner particles having an average circularity Cc of 0.98 or more; and external additives including monodisperse silica particles having an average diameter of primary particles of 20 nm or more and 70 nm or less and titanate particles having an average diameter of primary particles of 20 nm or more and 70 nm or less, wherein the absolute difference between the average diameter of primary particles of the monodisperse silica particles and the average diameter of primary particles of the titanate particles is 25 nm or less.

Abstract: An electrostatic image developing toner includes toner particles, an external additive A, and an external additive B. At least the external additive A is deposited on the surfaces of the toner particles. At least the external additive B is deposited on the external additive A. The external additive B includes an aggregate of two or more particles. The coverage of the toner particles with the external additive B is 3% by area or more with respect to the total surface area of the toner particles.

Abstract: An electrostatic image developing toner includes toner particles including a binder resin and a release agent, an external additive A, and an external additive B. At least the external additive A is present on the surface of the toner particles. At least the external additive B is present on the external additive A. The external additive B is an aggregate of two or more particles. The toner particles have an average circularity of 0.8 or more and 0.94 or less. The amount of the release agent present at the surface of the toner particles is 5 area % or more and 30 area % or less based on the total surface area of the toner particles.

Abstract: An electrostatic image developing toner includes a toner particle, an external additive A, and an external additive B. At least the external additive A is present on the surface of the toner particles. At least the external additive B is present on the external additive A. The number of peaks of the external additive B on the external additive A is 5 or more and 100 or less per 30 ?m peripheral length of the toner particle, the peaks having a height from the surface of the toner particle of 80 nm or more and 250 nm or less.

Abstract: A toner for electrostatic image development includes: toner particles; Si-doped strontium titanate particles; and silica particles. The particle diameter D of at least one peak in a number-based particle size distribution of primary particles of the silica particles is larger than the number-based median diameter D50 of primary particles of the Si-doped strontium titanate particles.

Abstract: An electrostatic image developing toner includes a toner particle, an external additive A, and an external additive B. At least the external additive A is present on the surface of the toner particles. At least the external additive B is present on the external additive A. The number of peaks of the external additive B on the external additive A is 5 or more and 100 or less per 30 ?m peripheral length of the toner particle, the peaks having a height from the surface of the toner particle of 80 nm or more and 250 nm or less.

Abstract: An electrostatic image developing toner includes toner particles including a binder resin and a release agent, an external additive A, and an external additive B. At least the external additive A is present on the surface of the toner particles. At least the external additive B is present on the external additive A. The external additive B is an aggregate of two or more particles. The toner particles have an average circularity of 0.8 or more and 0.94 or less. The amount of the release agent present at the surface of the toner particles is 5 area % or more and 30 area % or less based on the total surface area of the toner particles.

Abstract: An electrostatic image developing toner includes toner particles, an external additive A, and an external additive B. At least the external additive A is deposited on the surfaces of the toner particles. At least the external additive B is deposited on the external additive A. The external additive B includes an aggregate of two or more particles. The coverage of the toner particles with the external additive B is 3% by area or more with respect to the total surface area of the toner particles.