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

Abstract: An electrostatic charge image developing carrier includes magnetic particles and a resin coating layer that coats the magnetic particles, in which the resin coating layer contains inorganic particles, and in a case where an element ratio of metals and metalloids, that constitute the inorganic particles, is analyzed by X-ray photoelectron spectroscopy in a depth direction, and the element ratio at 0 seconds of etching is defined as A and the element ratio at 300 seconds of etching is defined as B, a value of B?A is 0.5 atm % or more and 3.0 atm % or less.

Abstract: An electrostatic charge image developer set includes a developer (1) and a developer (2) each containing a toner and a carrier, in which a carrier (1) of the developer (1) includes magnetic particles, a resin coating layer that covers the magnetic particles, and inorganic particles contained in the resin coating layer, a carrier (2) of the developer (2) includes magnetic particles and a resin coating layer that covers the magnetic particles, and a value of A(1)/A(2) is 17 or more and 105 or less, where when an element ratio of a metal and a semimetal that constitute the inorganic particles of the carrier (1) is analyzed by X-ray photoelectron spectroscopy for each of the carrier (1) and the carrier (2), an element ratio on a surface of the carrier (1) is denoted as A(1) and an element ratio on a surface of the carrier (2) is denoted as A(2).

Abstract: An electrostatic charge image developer contains a carrier and a toner, in which the carrier has magnetic particles, a resin coating layer that coats the magnetic particles, and inorganic particles contained in the resin coating layer, and in a case where an element ratio of metals and metalloids, that constitute the inorganic particles, is analyzed by X-ray photoelectron spectroscopy in a depth direction, and the element ratio at 0 seconds of etching is defined as A and the element ratio at 300 seconds of etching is defined as B, a value of B?A is 0.5 atm % or more and 3.0 atm % or less; and the toner contains toner particles, and in a dynamic viscoelasticity measurement of the toner particles in a case where a temperature is raised from 30° C. to 120° C., a minimal value tan ?(min) of a loss tangent is present at 50° C. or higher and 80° C. or lower and is 0.50 or more and 1.00 or less.

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 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??Formula (1).

Abstract: An image forming apparatus is an image forming apparatus of a trickle development type, in which a two-component developer containing a toner and a carrier A is accommodated in a developing machine and a toner is supplied together with a supply carrier B in response to a toner consumed by development, in which the carrier A has a magnetic core material A and a resin coating layer A coating the magnetic core material A, where the resin coating layer A contains no metal oxide particles, and the supply carrier B has a magnetic core material B and a resin coating layer B coating the magnetic core material B, where the resin coating layer B contains metal oxide particles.

Abstract: An electrostatic charge image developing carrier contains magnetic particles and a resin coating layer on a surface of the magnetic particles, in which inorganic particles are provided on a surface of the electrostatic charge image developing carrier or contained in the resin coating layer, the inorganic particles contains Ti and any of Ca, Sr, or Ba, an average circularity of primary particles of the inorganic particles is 0.82 or more and 0.94 or less, and a BET specific surface area of the magnetic particles is 0.12 m2/g or more and 0.24 m2/g or less.

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 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 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 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, 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 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 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.