Abstract: The peak top molecular weight of the tetrahydrofuran-soluble component of the toner, as measured by gel permeation chromatography, is 4,000 or more and 6,500 or less. The tetrahydrofuran-insoluble component of the toner is 10% by weight or more and 30% by weight or less. When the endothermic peak temperature T1 in the heating process and the exothermic peak temperature T2 during the cooling process originating from the ester wax is measured using a differential scanning calorimeter, the value T1-T2 is 15° C. or more and 30° C. or less.

Abstract: The peak top molecular weight of the tetrahydrofuran-soluble component of the toner, as measured by gel permeation chromatography, is 4,000 or more and 6,500 or less. The tetrahydrofuran-insoluble component of the toner is 10% by weight or more and 30% by weight or less. When the endothermic peak temperature T1 in the heating process and the exothermic peak temperature T2 during the cooling process originating from the ester wax is measured using a differential scanning calorimeter, the value T1-T2 is 15° C. or more and 30° C. or less.

Abstract: A two-component developer 100 includes a carrier 200 and a toner 300. The carrier 200 satisfies the relationships 100???220 and 300???480 when a voltage is applied in 1 V steps by a bridge resistance measurement method, where ? (V) is a carrier voltage value obtained when a current value flowing through the carrier 200 reaches 1.0?7 (A), and ? (V) is a carrier voltage value obtained when the current value reaches 1.0?5 (A).

Abstract: A toner contains toner particles that include a binding resin, a crystalline resin, an ester wax and a dispersant. The binding resin includes an amorphous polyester resin, and the dispersant includes an acrylic copolymer resin or a hybrid resin of the amorphous polyester resin and a styrene resin. When an endothermic peak temperature that is derived from the ester wax in a temperature rise is represented by T1, an exothermic peak temperature that is derived from the ester wax in cooling is represented by T2, a peak temperature of the crystalline resin is represented by Tc and the endothermic peak temperature, the exothermic peak temperature and the peak temperature are measured with a differential scanning calorimeter, T2<Tc<T1 is satisfied, and T1 is greater than 65° C. and less than 85° C.

Abstract: A two-component developer 100 includes a carrier 200 and a toner 300. The carrier 200 satisfies the relationships 100???220 and 300???480 when a voltage is applied in 1 V steps by a bridge resistance measurement method, where ? (V) is a carrier voltage value obtained when a current value flowing through the carrier 200 reaches 1.0?7 (A), and ? (V) is a carrier voltage value obtained when the current value reaches 1.0?5 (A).

Abstract: The peak top molecular weight of the tetrahydrofuran-soluble component of the toner, as measured by gel permeation chromatography, is 4,000 or more and 6,500 or less. The tetrahydrofuran-insoluble component of the toner is 10% by weight or more and 30% by weight or less. When the endothermic peak temperature T1 in the heating process and the exothermic peak temperature T2 during the cooling process originating from the ester wax is measured using a differential scanning calorimeter, the value T1-T2 is 15° C. or more and 30° C. or less.

Abstract: A toner includes toner particles including an amorphous polyester resin and a crystalline polyester resin. In the toner, the toner particles include metallic soap, and SPa [(cal/cm3)1/2] being the SP value (solubility parameter) of the amorphous polyester resin and SPb [(cal/cm3)1/2] being the SP value of the crystalline polyester resin satisfy the relationship, 0.9?SPa?SPb?1.8. A two-component developer includes the toner and a carrier. An image forming apparatus is used with the two-component developer.

Abstract: A toner contains at least a crystalline polyester resin and an amorphous linear polyester resin that uses diethylene glycol as an alcohol component, and a monoester wax and a montan ester wax as release agent components, wherein 6???8 and 14?mw/?<30 are satisfied, where ? represents an amount of the crystalline polyester resin added relative to 100 parts by weight of the amorphous linear polyester resin and mw represents an amount of the montan ester wax added.

Abstract: A toner contains at least a crystalline polyester resin and an amorphous linear polyester resin that uses diethylene glycol as an alcohol component, and a monoester wax and a montan ester wax as release agent components, wherein 6???8 and 14?mw/?<30 are satisfied, where ? represents an amount of the crystalline polyester resin added relative to 100 parts by weight of the amorphous linear polyester resin and mw represents an amount of the montan ester wax added.

Abstract: The toner including a crystalline polyester resin dispersed in an amorphous polyester resin obtained by polymerizing a bivalent alcohol component and a dicarboxylic component, the crystalline polyester resin containing a linear saturated aliphatic polyester unit and being dispersed by a monoester-based wax added as a detaching agent, wherein the crystalline polyester resin in the toner has a dispersion diameter of 100 nm or more and 500 nm or less, and the monoester-based wax has a dispersion diameter of 200 nm or more and 1,000 nm or less.

Abstract: The toner including a crystalline polyester resin dispersed in an amorphous polyester resin obtained by polymerizing a bivalent alcohol component and a dicarboxylic component, the crystalline polyester resin containing a linear saturated aliphatic polyester unit and being dispersed by a monoester-based wax added as a detaching agent, wherein the crystalline polyester resin in the toner has a dispersion diameter of 100 nm or more and 500 nm or less, and the monoester-based wax has a dispersion diameter of 200 nm or more and 1,000 nm or less.

Abstract: The two-component developer constituted of a toner and carriers, wherein the toner contains a crystalline polyester resin, constituted of a linear saturated aliphatic polyester unit, dispersed in an amorphous polyester resin obtained by polymerizing a bivalent alcohol component monomer and a dicarboxylic acid as an acid component monomer; wherein the carriers have a magnetic property and have core particles covered with a covering layer containing at least a binder resin and aminopropyltriethoxysilane; and wherein an image of the magnetic carriers photographed by a scanning electron microscope shows the following features: a percentage of a total area of high-brightness parts derived from a metal oxide on the one magnetic carrier particle to a total projected area is 3.

Abstract: Toner of one aspect of the present invention has a weight average molecular weight Mw of 30,000?Mw?95,263 as determined from a molecular weight distribution based on GPC, includes a THF-insoluble gel component at a weight proportion of less than 5%, and includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC.

Abstract: Toner of one aspect of the present invention has a weight average molecular weight Mw of 30,000?Mw?95,263 as determined from a molecular weight distribution based on GPC, includes a THF-insoluble gel component at a weight proportion of less than 5%, and includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC.

Abstract: A two-component color developer containing a toner and a resin-coated carrier, the toner containing at least a polyester resin as a binding resin, an organic pigment as a colorant and inorganic fine particles as an external additive, wherein the inorganic fine particles have a negative polarity, the toner has a volume resistivity of 40×109 to 220×109 ?cm and a negative polarity, and the carrier has a coat durability of 90% or greater.

Abstract: Toners of respective colors of a full-color toner set each contain a binder resin which is polyester resin; and a release agent dispersing aid which is styrene acrylic copolymer resin having at least one of an ?-methylstyrene structure and a styrene structure. The styrene acrylic copolymer resin is contained in an amount of 7 parts by weight to 14 parts by weight with respect to 100 parts by weight of the polyester resin. The full-color toner set has a sum of resistivities of the toners of the respective colors of 410×109 to 510×109 (?·cm).

Abstract: Toners of respective colors of a full-color toner set each contain a binder resin which is polyester resin; and a release agent dispersing aid which is styrene acrylic copolymer resin having at least one of an ?-methylstyrene structure and a styrene structure. The styrene acrylic copolymer resin is contained in an amount of 7 parts by weight to 14 parts by weight with respect to 100 parts by weight of the polyester resin. The full-color toner set has a sum of resistivities of the toners of the respective colors of 410×109 to 510×109 (?·cm).

Abstract: A toner for electrostatic image development is configured such that: a binder resin is polyester resin; a release agent dispersing aid is styrene acrylic copolymer resin having at least one of an ?-methylstyrene structure and a styrene structure, and is contained in an amount of 5.5 parts by weight to 12 parts by weight with respect to 100 parts by weight of the polyester resin; and the styrene acrylic copolymer resin has an acid value of 3 KOHmg/g to 9 KOHmg/g, and the toner for electrostatic image development has an acid value of 14 KOHmg/g to 19 KOHmg/g.

Abstract: Toner of one aspect of the present invention has a weight average molecular weight Mw of 30,000?Mw?95,263 as determined from a molecular weight distribution based on GPC, includes a THF-insoluble gel component at a weight proportion of less than 5%, and includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC.

Abstract: A two-component color developer containing a toner and a resin-coated carrier, the toner containing at least a polyester resin as a binding resin, an organic pigment as a colorant and inorganic fine particles as an external additive, wherein the inorganic fine particles have a negative polarity, the toner has a volume resistivity of 40×109 to 220×109 ?cm and a negative polarity, and the carrier has a coat durability of 90% or greater.