Abstract: The toner contains binder resin-containing toner particles and silica fine particle S1, wherein the weight-average particle diameter of the toner is 4.0-15.0 ?m, both inclusive, peaks originating with the silica fine particle S1 are observed in 29 Si-NMR measurement of the silica fine particle S1, and, in the spectrum obtained by 29Si CP/MAS NMR or 29Si DD/MAS NMR, the peak area of a peak corresponding to the D1 unit structure in the silica fine particle S1, the peak area of a peak corresponding to the D2 unit structure in the silica fine particle S1, and the peak area of a peak corresponding to the Q unit structure in the silica fine particle S1 satisfy a prescribed relationship.

Abstract: An electrostatic charge image developing toner set includes an electrostatic charge image developing black toner that includes black toner particles including a black colorant, a binder resin, and a release agent, and inorganic particles containing an oil; and an electrostatic charge image developing color toner that includes color toner particles including a color colorant, a binder resin, and a release agent, and inorganic particles containing an oil, wherein a proportion of the release agent exposed to a surface of the color toner particles is greater than a proportion of the release agent exposed to a surface of the black toner particles.

Abstract: An electrostatic charge image developing toner includes toner mother particles containing at least a binder resin, elastomer particles including a first oil, and inorganic particles including a second oil, wherein a viscosity of the first oil is equal to or higher than a viscosity of the second oil.

Abstract: An electrostatic charge image developing toner set includes an electrostatic charge image developing black toner that includes black toner particles including a black colorant, a binder resin, and a release agent, and inorganic particles containing an oil; and an electrostatic charge image developing color toner that includes color toner particles including a color colorant, a binder resin, and a release agent, and inorganic particles containing an oil, wherein a proportion of the release agent exposed to a surface of the color toner particles is greater than a proportion of the release agent exposed to a surface of the black toner particles.

Abstract: An electrostatic charge image developing toner set includes an electrostatic charge image developing black toner that includes black toner particles including a black colorant, a binder resin, and a release agent, and inorganic particles having an average particle diameter of 50 nm to 300 nm; and an electrostatic charge image developing color toner that includes color toner particles including a color colorant, a binder resin, and a release agent, and inorganic particles having an average particle diameter of 50 nm to 300 nm, wherein a proportion of the release agent exposed to a surface of the color toner particles is greater than a proportion of the release agent exposed to a surface of the black toner particles.

Abstract: An electrostatic-image developing toner contains toner particles and particles of a metallic salt of a fatty acid deposited on the toner particles. The particles of the metallic salt of the fatty acid contain 0.0008% to 0.01% by mass of iron.

Abstract: An electrostatic-image developing toner contains toner particles and particles of a metallic salt of a fatty acid deposited on the toner particles. The particles of the metallic salt of the fatty acid contain 0.0008% to 0.01% by mass of iron.

Abstract: An electrostatic charge image developing toner includes toner mother particles containing at least a binder resin, elastomer particles including a first oil, and inorganic particles including a second oil, wherein a viscosity of the first oil is equal to or higher than a viscosity of the second oil.

Abstract: An image forming apparatus includes a first image forming unit and a second image forming unit, wherein the first image forming unit is arranged on a downstream side of the second image forming unit in a traveling direction of a transfer medium, the first developing unit contains a first developer containing a first toner and a first carrier, the second developing unit contains a second developer containing a second toner and a second carrier, and a ratio of a resistance value of the first carrier to a resistance value of the second carrier is within a range of from 4.0×10?5 to 9.7×10?1.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive includes particles having oil-treated surfaces and composite particles containing silica and titania, and the toner has a content ratio of titania with respect to silica on the surface of the toner, as measured by X-ray photoelectron spectroscopy, of equal to or less than 5 atomic %.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive includes particles having oil-treated surfaces and composite particles containing silica and titania, and the toner has a content ratio of titania with respect to silica on the surface of the toner, as measured by X-ray photoelectron spectroscopy, of equal to or less than 5 atomic %.