Abstract: A toner set has a white toner and a color toner, in which in a case where Cw [mg/L] represents an amount of a cation on a surface of the white toner, measured by ion chromatography, and Cc [mg/L] represents an amount of a cation on a surface of the color toner, measured by ion chromatography, the toner set satisfies Conditions (1) and (2). 0.3 mg/L?Cc?1.2 mg/L??(1) (Cw/Cc)?0.

Abstract: An electrostatic image developing white toner includes white toner particles including a binder resin and a white coloring agent; and an external additive including poly(meth)acrylate particles, wherein the white toner particles have a volume-average particle size D50W of 6.0 ?m or more and 10 ?m or less, a ratio of the white toner particles having a particle size of 3.2 ?m or less relative to all the white toner particles is 0.5 vol % or more and 3 vol % or less, the white toner particles have a specific surface area Sw of 0.7 cm2/g or more and 1.2 cm2/g or less, and an external addition amount of the poly(meth)acrylate particles relative to the white toner particles is 0.1 mass % or more and 2.0 mass % or less.

Abstract: An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by WW, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represe

Abstract: A white toner includes a toner particle that contains a binder resin, a release agent, and titanium oxide, at least a part of the titanium oxide being present in a release agent domain, in which in observation of a cross section of the toner particle, an average major axis length Dt of the toner particle, an average major axis length Dw of the release agent domain, and an average major axis length Dp of the titanium oxide in the release agent domain satisfy Expressions (1) and (2). 2×Dp?Dw?10×Dp??Expression (1): 0.1×Dt?Dw?0.

Abstract: A white toner includes a toner particle that contains a binder resin containing a hybrid resin in which an amorphous resin unit and a crystalline polyester resin unit are chemically bonded to each other, surface-treated titanium oxide, and a release agent, in which a proportion of Al atoms in a surface of the surface-treated titanium oxide is 3 atomic % or greater and 20 atomic % or less, and a proportion of Ti atoms in the surface is 5 atomic % or greater and 15 atomic % or less.

Abstract: A photoluminescent toner includes a photoluminescent toner particle that contains a binder resin, a release agent, and a photoluminescent pigment and has a release agent domain, and a silicone oil-treated silica particle that is externally added to the photoluminescent toner particle, in which in observation of a cross section of the photoluminescent toner particle, an average major axis length Dw of the release agent domain and an average major axis length Dp of the photoluminescent pigment satisfy Expression (1). 0.3?Dw/Dp?1.

Abstract: A toner for developing an electrostatic charge image includes toner particles that include a binder resin, a releasing agent, a brilliant pigment, and an aminocarboxylic acid compound.

Abstract: An electrostatic charge image developing toner includes toner particles having an average circularity of 0.96 to 1.00 and organic particles having an aspect ratio of 0.4 to 0.9 as an external additive.

Abstract: A carrier for developing an electrostatic charge image has magnetic particles and a resin coating that covers the magnetic particles and contains at least one lubricant. The resin coating has a dispersed phase of the lubricant and meets requirement (1). Requirement (1): the lubricant content in a top layer>the lubricant content in a middle layer>the lubricant content in a bottom layer The top, middle, and bottom layers are of the resin coating divided into three in the direction of thickness, and the lubricant content is the percentage area of the dispersed phase of the lubricant in a cross-section of the layer taken along the thickness thereof.

Abstract: A carrier for developing an electrostatic charge image has magnetic particles and a resin coating that covers the magnetic particles and contains at least one lubricant. The resin coating has a dispersed phase of the lubricant and meets requirement (1). Requirement (1): the lubricant content in a top layer>the lubricant content in a middle layer>the lubricant content in a bottom layer The top, middle, and bottom layers are of the resin coating divided into three in the direction of thickness, and the lubricant content is the percentage area of the dispersed phase of the lubricant in a cross-section of the layer taken along the thickness thereof.

Abstract: An electrostatic charge image developing toner includes toner particles having an average circularity of 0.96 to 1.00 and organic particles having an aspect ratio of 0.4 to 0.9 as an external additive.

Abstract: An electrostatic-image developing toner contains toner particles containing a polycondensate resin and hydrophobic external additive particles having a volume average particle size of about 40 to about 200 nm. The electrostatic-image developing toner has a difference between a half-fall temperature T1/2A and a half-fall temperature T1/2B of about 2.0° C. to about 10° C. The half-fall temperature T1/2A is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 16.5 g/m3 for 2 hours. The half-fall temperature T1/2B is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 82.7 g/m3 for 2 hours.

Abstract: An electrostatic-image developing toner contains toner particles, each including a core particle and a shell layer disposed on at least a portion of a surface of the core particle. The core particle contains a first amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 5% by mass or less of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The shell layer contains a second amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 50% by mass or more of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The electrostatic-image developing toner has a water content of about 2.0% to about 5.0% by mass.

Abstract: An electrostatic-image developing toner contains toner particles, each including a core particle and a shell layer disposed on at least a portion of a surface of the core particle. The core particle contains a first amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 5% by mass or less of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The shell layer contains a second amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 50% by mass or more of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The electrostatic-image developing toner has a water content of about 2.0% to about 5.0% by mass.

Abstract: An electrostatic-image developing toner contains toner particles containing a polycondensate resin and hydrophobic external additive particles having a volume average particle size of about 40 to about 200 nm. The electrostatic-image developing toner has a difference between a half-fall temperature T1/2A and a half-fall temperature T1/2B of about 2.0° C. to about 10° C. The half-fall temperature T1/2A is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 16.5 g/m3 for 2 hours. The half-fall temperature T1/2B is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 82.7 g/m3 for 2 hours.

Abstract: An image forming apparatus includes a developing unit that contains an electrostatic charge image developer which contains a carrier and an electrostatic charge image developing toner, wherein the toner includes toner particles which contain a polyester resin, which is a polycondensate of a polycarboxylic acid and a polyol, and has a glass transition temperature of 50° C. to 70° C., the polyol includes a polyol not having a bisphenol A structure in a range of 50% by weight to 100% by weight, and a melt viscosity A of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 82.7 (g/m3) and a melt viscosity B of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 16.5 (g/m3) each are in the ranges specified in the specification.

Abstract: An electrostatic charge image developing toner includes a carbodiimide compound and a polyester resin prepared by subjecting an alcohol component and a carboxylic acid component to condensation polymerization, wherein the alcohol component includes an aliphatic polyol in an amount of 60 mol % to 100 mol %.

Abstract: An image forming apparatus includes a developing unit that contains an electrostatic charge image developer which contains a carrier and an electrostatic charge image developing toner, wherein the toner includes toner particles which contain a polyester resin, which is a polycondensate of a polycarboxylic acid and a polyol, and has a glass transition temperature of 50° C. to 70° C., the polyol includes a polyol not having a bisphenol A structure in a range of 50% by weight to 100% by weight, and a melt viscosity A of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 82.7 (g/m3) and a melt viscosity B of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 16.5 (g/m3) each are in the ranges specified in the specification.

Abstract: An electrostatic charge image developing toner includes toner mother particles that contain a polyester resin which is a polycondensate of a polycarboxylic acid compound and a polyol compound; a graft polymer which includes a polyolefin chain and a vinyl resin chain; a coloring agent; and polyethylene wax, provided that the polyol compound includes a polyol compound having a bisphenol structure in an amount of 0 mol % to 5 mol %, wherein a normal temperature and normal humidity aggregation degree of the toner mother particles is from 70% to 97%.

Abstract: An electrostatic charge image developing toner includes a carbodiimide compound and a polyester resin prepared by subjecting an alcohol component and a carboxylic acid component to condensation polymerization, wherein the alcohol component includes an aliphatic polyol in an amount of 60 mol % to 100 mol %.