Abstract: An electrostatic charge image developing toner includes: a toner particle containing a binder resin; and an external additive containing alumina particles having a volume average particle diameter of more than 5 nm and 80 nm or less and silica particles having a volume average particle diameter of 10 nm or more and 90 nm or less, and in the toner particle, a Net intensity NA of a total of an alkali metal element and an alkaline earth metal element, measured by fluorescence X-ray analysis, is 0.10 kcps or more and 1.30 kcps or less, and a ratio (Ws/Wa) of a content Ws of the silica particles to a content Wa of the alumina particles is more than 0.5 and less than 35.

Abstract: A method for producing a toner for electrostatic charge image development includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; terminating growth of the aggregated particles by adding an alkaline aqueous solution to a dispersion containing the aggregated particles to increase a pH of the dispersion containing the aggregated particles; and fusing and coalescing the aggregated particles into toner particles by heating the dispersion containing the aggregated particles. Terminating the growth of the aggregated particles includes, while stirring the dispersion containing the aggregated particles, stepwise or continuously reducing a stirring power per unit volume.

Abstract: An electrostatic image developing toner includes an amorphous polyester resin and a crystalline polyester resin, wherein a Net intensity NNa of a Na element and a Net intensity NCl of a Cl element, the Net intensities NNa and NCl being determined by X-ray fluorescence analysis, satisfy 2.5?NCl/NNa?260.0.

Abstract: A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that in an x-ray fluorescence analysis of the toner, the net intensity of the peak for the Mg element is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of at least one compound represented by formula (1), MTiO3??(1) where M represents at least one selected from the group consisting of Ca, Sr, and Ba.

Abstract: A method for producing a toner for developing electrostatic charge images includes: preparing a first dispersion containing, dispersed therein, first aggregated particles containing a binder resin; preparing a second dispersion containing second aggregated particles dispersed therein, the second aggregated particles being prepared by attaching resin particles to surfaces of the first aggregated particles in the first dispersion; heating the second dispersion to a fusion temperature at which the second aggregated particles in the second dispersion are fused to each other; and holding the second dispersion at the fusion temperature. 20 mass% or more of a weak acid relative to the mass of the second aggregated particles is added to the second dispersion during the heating of the second dispersion or the holding of the second dispersion, or during the heating of the second dispersion and the holding of the second dispersion.

Abstract: A method for producing an electrostatic charge image developing toner includes forming aggregated particles by aggregating at least resin particles in a dispersion liquid containing the resin particles, and fusing/coalescing the aggregated particles by heating an aggregated particle dispersion liquid containing a base having volatility and the aggregated particles dispersed therein in a fusion/coalescence tank which houses the aggregated particle dispersion liquid. In fusing/coalescing the aggregated particles, at least one of conditions (1) to (3) below is satisfied, (1): The fusion/coalescence tank has one or plural openings in an upper portion thereof, and the total area ratio of the openings is 5 cm2/m3 or more per unit amount of the aggregated particle dispersion liquid, (2): The aggregated particles are fused/coalesced in the fusion/coalescence tank in a state of reduced pressure within a range of (atmospheric pressure?0.

Abstract: An electrostatic image developing toner includes an amorphous polyester resin, a crystalline polyester resin, and C.I. Pigment Red 57:1, wherein a Net intensity NMg of an Mg element, the Net intensity NMg of being determined by X-ray fluorescence analysis, is 0.10 kcps or more and 0.40 kcps or less.

Abstract: A toner for electrostatic image development contains toner particles containing a binder resin. The binder resin includes an amorphous resin and a crystalline resin. In the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.40 to 1.20 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.

Abstract: A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and external additives including particles of at least one compound represented by formula (1) and particles of a metal salt of a fatty acid, MTiO3??(1) where M represents at least one selected from the group consisting of Ca, Sr, and Ba.

Abstract: A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of a metal salt of a fatty acid.

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: An electrostatic image developing toner includes toner particles containing a binder resin and a release agent. In sections of the toner particles in which the sections of the toner particles have an area St in total and, among sections of domains of the release agent, sections of domains having long diameters of 10 nm or more and 500 nm or less have a total area Sa and sections of domains having long diameters of 1500 nm or more and 3000 nm or less have a total area Sb, an area fraction Sa/St is 2% or more and an area fraction Sb/St is 20% or more.

Abstract: A toner for electrostatic image development contains toner particles containing a binder resin. The binder resin includes an amorphous resin and a crystalline resin. In the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.02 to 0.15 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.

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 including a binder resin and a release agent. When a cross section of the toner particle is observed, the toner particle satisfies a condition (A1) below: Condition (A1): the toner particle includes one or more domains of the release agent, the one or more domains having a diameter equal to 8% or more and 30% or less of the maximum diameter of the toner particle, the one or more domains having a geometric center at a depth of R/2 or less below the surface of the toner particle, where R represents the distance between the geometric center of the toner particle and the surface of the toner particle, the one or more domains being entirely included in an inside portion of the toner particle which extends below a depth of 50 nm from the surface of the toner particle.

Abstract: An electrostatic image developing toner includes a toner particle including a binder resin and a release agent. When a cross section of the toner particle is observed, the toner particle satisfies conditions (A) and (B) below: Condition (A): plural domains of the release agent, the domains having a diameter equal to 10% or more and 35% or less of the maximum diameter of the toner particle, are present in the toner particle; and Condition (B): the average of the distances between the centers of gravity of the domains of the release agent is 35% or more and 60% or less of the maximum diameter of the toner particle.

Abstract: An electrostatic image developing toner includes a toner particle including an amorphous resin, a crystalline resin, and a release agent. When a cross section of the toner particle is observed, the toner particle satisfies conditions (A1) and (B1) below: Condition (A1): one or more domains of the crystalline resin, the domains having a diameter equal to 10% or more and 40% or less of the maximum diameter of the toner particle, are present in the toner particle, and Condition (B1): one or more domains of the release agent, the domains having a diameter equal to 10% or more and 40% or less of the maximum diameter of the toner particle, are present in the toner particle.

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 image developing toner includes a toner particle including a binder resin and a colorant. The net intensity NS of sulfur included in the toner particle and the total net intensity NA of an alkali metal and an alkaline-earth metal included in the toner particle, which are measured by X-ray fluorescence analysis, satisfy 1.0<NS/NA<22.0.