Abstract: A toner including inorganic particles, wherein the inorganic particles include a fluorine-containing alumina, and the toner satisfies both Formula (1) below and Formula (2) below: 2.7?X1/X2?5.5 . . . Formula (1); and 2.1?X1?3.0 . . . Formula (2) where X1 denotes a concentration of aluminum in the toner and X2 denotes a concentration of fluorine in the toner, and the concentration of aluminum and the concentration of fluorine are determined through an X-ray photoelectron spectroscopic analysis method.

Abstract: A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.

Abstract: Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.

Abstract: Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.

Abstract: A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.

Abstract: A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan ?), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85° C. to 110° C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85° C. to 120° C.

Abstract: A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 ?m2 image area of the toner observed with a field-emission scanning electron microscope.

Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.

Abstract: A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.

Abstract: A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 ?m2 image area of the toner observed with a field-emission scanning electron microscope.

Abstract: A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95° C. to 115° C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan ?)=loss elastic modulus (G?)/storage elastic modulus (G?).

Abstract: A toner for electrophotography, the toner including an amorphous polyester resin, an addition polymerization-based resin, and wax that is ester wax or carnauba wax, wherein the toner satisfies relationships represented by Formula 1 and Formula 2 below, SPr>SPw>SPd??(Formula 1) |SPr?SPw|>|SPw?SPd|??(Formula 2) where SPr is a value of a solubility parameter of the amorphous polyester resin, SPw is a value of a solubility parameter of the wax, and SPd is a value of a solubility parameter of the addition polymerization-based resin.

Abstract: Toner contains a binder resin, a releasing agent, and a tri- or higher metal salt, wherein the toner has a weight average molecular weight (Mw) of from 7,000 to 10,000, a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn) of 5 or less, and an acid value of from 6 mgKOH/g to 12 mgKOH/g, wherein the binder resin is a polyester resin, wherein the releasing agent is a monoester wax.

Abstract: A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan ?), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85° C. to 110° C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85° C. to 120° C.

Abstract: A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.

Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.

Abstract: A toner for electrophotography, the toner including an amorphous polyester resin, an addition polymerization-based resin, and wax that is ester wax or carnauba wax, wherein the toner satisfies relationships represented by Formula 1 and Formula 2 below, SPr>SPw>SPd??(Formula 1) |SPr?SPw|>|SPw?SPd|??(Formula 2) where SPr is a value of a solubility parameter of the amorphous polyester resin, SPw is a value of a solubility parameter of the wax, and SPd is a value of a solubility parameter of the addition polymerization-based resin.

Abstract: A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95° C. to 115° C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan ?)=loss elastic modulus (G?)/storage elastic modulus (G?).