Abstract: An electrostatic charge image developing toner includes: a toner particle containing a binder resin; and an external additive including a silica particle having a circularity of more than 0.5 and. 0.9 or less and a volume average particle diameter of more than 100 nm and 300 nm or less, in which a total Net intensity NA of an alkali metal element and an alkaline earth metal element in the toner particle measured by fluorescence X-ray analysis is 0.10 kcps or more and 1.20 kcps or less.

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 preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles, in which the aggregating includes adding a divalent or higher valent metal salt compound to the dispersion containing the binder resin particles, and the preparing method satisfies the following Requirement (1), Requirement (1): a ratio M/S of a total metal ion amount M (mol) generated from the divalent or higher valent metal salt compound to a total surface area S (m2) of the binder resin particles at a start of the aggregating is 1.5×1010 or more and 2.5×1013 or less.

Abstract: A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles, in which the coalescing includes heating the dispersion containing the aggregated particles to 80° C. or higher so that a temperature of the dispersion containing the aggregated particles reaches 80° C., and then adding an acid and a surfactant to the dispersion containing the aggregated particles.

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 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 containing an amorphous resin and a crystalline resin. The toner particles include first toner particles. When a cross section of each of the first toner particles is observed, at least two domains of the crystalline resin satisfy conditions (A), (B1), (C), and (D) below: condition (A): an aspect ratio of each of the at least two domains of the crystalline resin is from 5 to 40 inclusive; condition (B1): a length of a major axis of each of the at least two domains of the crystalline resin is from 0.5 ?m to 1.

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 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 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: 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 electrostatic image development includes toner particles containing an amorphous resin and a crystalline resin. The toner particles include first toner particles. When a cross section of each of the first toner particles is observed, at least two domains of the crystalline resin satisfy conditions (A), (B1), (C), and (D) below: condition (A): an aspect ratio of each of the at least two domains of the crystalline resin is from 5 to 40 inclusive; condition (B1): a length of a major axis of each of the at least two domains of the crystalline resin is from 0.5 ?m to 1.

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 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: 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: 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.

Abstract: An electrostatic-image developing toner includes toner particles, aggregated silica particles A treated with an oil, and aggregated or non-aggregated silica particles B rendered hydrophobic with a hydrophobizing agent other than an oil. The average particle size Da of the aggregated silica particles A and the average particle size Db of the silica particles B satisfy Da?Db. The electrostatic-image developing toner does not include any external additive other than the aggregated silica particles A or the silica particles B, or the electrostatic-image developing toner includes an external additive other than the aggregated silica particles A or the silica particles B, the other external additive having an average particle size smaller than the average particle size Da.

Abstract: An electrostatic-image developing toner includes toner particles, aggregated silica particles A treated with an oil, and aggregated or non-aggregated silica particles B rendered hydrophobic with a hydrophobizing agent other than an oil. The average particle size Da of the aggregated silica particles A and the average particle size Db of the silica particles B satisfy Da?Db. The electrostatic-image developing toner does not include any external additive other than the aggregated silica particles A or the silica particles B, or the electrostatic-image developing toner includes an external additive other than the aggregated silica particles A or the silica particles B, the other external additive having an average particle size smaller than the average particle size Da.