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 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 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 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 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 image developer includes a toner containing toner particles, a carrier, and an external additive containing titanium dioxide particles of two types having different refractive indexes, fatty acid metal salt particles, and an abrasive.

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 developer includes a toner containing toner particles, a carrier, and an external additive containing titanium dioxide particles of two types having different refractive indexes, fatty acid metal salt particles, and an abrasive.

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 toner particles, inorganic particles externally added to the toner particles, and a low-molecular-weight siloxane having a molecular weight of 200 or more and 600 or less. The low-molecular-weight siloxane includes only a siloxane bond and an alkyl group. The total content of the low-molecular-weight siloxane in the electrostatic-image developing toner is, by mass, 0.01 ppm or more and 5 ppm or less.

Abstract: Provided is an electrostatic charge image developing toner including: toner particles; and strontium titanate particles A and strontium titanate particles B having different average primary particle diameters from each other. The strontium titanate particles B have an average primary particle diameter Db of 10 nm to 100 nm. An average primary particle diameter Da of the strontium titanate particles A and the average primary particle diameter Db of the strontium titanate particles B satisfy a relationship of 10?Da/Db?100.

Abstract: An electrostatic charge image developing toner includes: a toner particle having average circularity of 0.91 or more and 0.98 or less, a silica particle externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has average primary particle circularity of 0.82 or more and 0.94 or less, and circularity that becomes 84% of accumulation of the primary particle of more than 0.92.

Abstract: An electrostatic charge image developing toner includes: a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more and 20 atom % or less; and a strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more and 100 nm or less.

Abstract: An electrostatic charge image developing toner includes a toner particle, a lubricant particle that is externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has an average primary particle circularity of 0.82 or more and 0.94 or less, and that has a primary particle circularity that becomes 84% of accumulation of more than 0.92.

Abstract: Provided is an electrostatic charge image developing toner including: toner particles; and strontium titanate particles A and strontium titanate particles B having different average primary particle diameters from each other. The strontium titanate particles B have an average primary particle diameter Db of 10 nm to 100 nm. An average primary particle diameter Da of the strontium titanate particles A and the average primary particle diameter Db of the strontium titanate particles B satisfy a relationship of 10?Da/Db?100.

Abstract: An electrostatic charge image developing toner includes: a toner particle and a strontium titanate particle that is externally added to the toner particle, in which an average primary particle diameter of the strontium titanate particle that is present on a surface of the toner particle is 30 nm or more and 100 nm or less, and average primary particle circularity is 0.82 or more and 0.94 or less, and in which circularity that becomes 84% of accumulation of the primary particle is greater than 0.92.

Abstract: An electrostatic charge image developing toner includes a toner particle; a strontium titanate particle that is externally added to the toner particle and that is doped with a metal element having an electronegativity of 1.3 or less; and a silica particle that is externally added to the toner particle, in which in a case where a detected peak intensity of a metal element having an electronegativity of 1.3 or less is Me-R, a detected peak intensity of strontium is Sr—R, a detected peak intensity of silicon is Si—R, and an element proportion of strontium is Sr—P, Conditions (1) to (3) are satisfied, 0.08 kcps?Me-R?10 kcps,??(1) 0.1%?Sr—P?3.0%, and??(2) 0.15?Sr—R/Si—R?12.

Abstract: Provided is a toner external additive including: a strontium titanate particle which has a hydrophobized surface, in which an average primary particle diameter is 10 nm or more and 100 nm or less, and a specific volume resistivity R1 is 11 or more and 14 or less in terms of a common logarithm value log R1.

Abstract: An electrostatic charge image developing toner includes: a toner particle and a strontium titanate particle that is externally added to the toner particle, in which an average primary particle diameter of the strontium titanate particle that is present on a surface of the toner particle is 30 nm or more and 100 nm or less, and average primary particle circularity is 0.82 or more and 0.94 or less, and in which circularity that becomes 84% of accumulation of the primary particle is greater than 0.92.

Abstract: An electrostatic charge image developing toner includes: a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more and 20 atom % or less; and a strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more and 100 nm or less.