Abstract: Provided is a toner including a toner particle containing an amorphous resin, a colorant, a release agent, and a crystalline resin, wherein, when ?0.01 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.01 and ?0.69 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.69, ?0.01 and ?0.69 satisfy the relationships of the following formulas (1) and (2): 3.0×104 Pa??0.01?2.0×105 Pa??formula (1) 2.0?[?0.69/?0.01].

Abstract: A toner comprising a toner particle and inorganic fine particles present on the surface of the toner particle, wherein particle diameter numerical distribution of the inorganic fine particles on the toner particle surface has a peak A1 and B1 present in specific particle diameter ranges, the proportion of inorganic fine particles having a particle diameter of 5 nm to 30 nm is not more than 10 number %, after the toner has been subjected to a water wash treatment, the particle diameter numerical distribution of the of the primary particles of the inorganic fine particles on the toner particle surface has a peak A2 and B2 in specific particle diameter ranges; and HB1, which is a peak value of the peak B1, and HB2, which is a peak value of the peak B2, satisfy a specific relationship.

Abstract: A toner having a toner particle that is produced through a step of melt-kneading a resin composition containing a binder resin, a colorant, a hydrocarbon wax, and a wax dispersing agent, cooling the obtained kneaded material, pulverizing the obtained cooled material, and heat treating the resulting resin particles, wherein the wax dispersing agent is a polymer provided by graft polymerizing a styrene-acrylic polymer onto a polypropylene, the styrene-acrylic polymer is a polymer having a monomer unit derived from a cycloalkyl (meth)acrylate, and specific relationships are satisfied where Mp(p) is the melting point (° C.) of the polypropylene and Mp(w) is the melting point (° C.) of the hydrocarbon wax.

Abstract: A toner having a toner particle containing an amorphous resin, a crystalline resin, a colorant, a release agent, and a polymer in which a styrene-acrylic polymer is graft-polymerized on a polyolefin, wherein the amorphous resin contains an amorphous polyester resin A, and the amorphous polyester resin A has a monomer unit derived from polyhydric alcohol and a monomer unit derived from polyhydric carboxylic acid, has, a particular amount of a succinic acid-derived monomer unit in the monomer unit derived from polyhydric carboxylic acid, and has, a particular amount of a monomer unit derived from a propylene oxide adduct on bisphenol A in the monomer unit derived from polyhydric alcohol; and has a particular softening point, a particular solubility parameter, and a particular peak molecular weight.

Abstract: A wax dispersant for a toner including a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound, and a toner including a toner particle that contains a binder resin, a wax, and a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound.

Abstract: The present invention provides a toner that excels in low-temperature fixability and also maintains charging performance, storability, and anti-hot offset property even in long-term image output. The toner comprising a toner particle containing an amorphous polyester resin, a crystalline polyester resin, wax, and a colorant, wherein a weight-average molecular weight (Mw) of the crystalline polyester resin is 5000 to 14,000, and the crystalline polyester resin includes 0.5 mass % to 15.0 mass % of a segment derived from one or more aliphatic compounds selected from the group consisting of aliphatic monocarboxylic acids with a carbon number of 8 to 20 and aliphatic monohydric alcohols with a carbon number of 8 to 20.

Abstract: Provided is a toner including a toner particle containing an amorphous resin, a colorant, a release agent, and a crystalline resin, wherein, when ?0.01 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.01 and ?0.69 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.69, ?0.01 and ?0.69 satisfy the relationships of the following formulas (1) and (2): 3.0×104 Pa??0.01?2.0×105 Pa??formula (1) 2.0?[?0.69/?0.01].

Abstract: A magnetic carrier is provided which can suppress a decrease in glossiness even in a long term use for POD which requires high glossiness. A magnetic carrier includes a filled core particle in which a silicone resin is filled in pores of a porous magnetic core particle and a vinyl resin coating a surface of the filled core particle. In a pore distribution of the porous magnetic core particle measured by a mercury intrusion method, a cumulative pore volume in a pore diameter range of 0.1 to 3.0 ?m is 35.0 to 95.0 mm3/g, and in a pore distribution of the filled core particle measured by a mercury intrusion method, a cumulative pore volume in a pore diameter range of 0.1 to 3.0 ?m is 3.0 to 15.0 mm3/g. The magnetic carrier includes 1.2 to 3.0 parts by mass of the vinyl resin to 100.0 parts by mass of the filled core particle.

Abstract: A toner is provided, which is obtained by heat treating a toner particle containing a crystalline polyester resin, an amorphous polyester resin, a hydrocarbon wax and a wax dispersant, wherein the crystalline polyester resin is a hybrid resin having crystalline polyester segments and amorphous vinyl segments, and a mass ratio of crystalline polyester segments and amorphous vinyl segments in the crystalline polyester resin (crystalline segments/amorphous segments) is 70/30 to 98/2.

Abstract: A toner having a toner particle that is produced through a step of melt-kneading a resin composition containing a binder resin, a colorant, a hydrocarbon wax, and a wax dispersing agent, cooling the obtained kneaded material, pulverizing the obtained cooled material, and heat treating the resulting resin particles, wherein the wax dispersing agent is a polymer provided by graft polymerizing a styrene-acrylic polymer onto a polypropylene, the styrene-acrylic polymer is a polymer having a monomer unit derived from a cycloalkyl (meth)acrylate, and specific relationships are satisfied where Mp(p) is the melting point (° C.) of the polypropylene and Mp(w) is the melting point (° C.) of the hydrocarbon wax.

Abstract: Provided is a toner, including toner particles each containing a binder resin containing a polyester ? as a main component, a colorant, a wax, and a crystalline polyester, in which: the polyester ? has a polyhydric alcohol unit and a polyvalent carboxylic acid unit; and the polyester ? has, as the polyhydric alcohol unit, a polyhydric alcohol unit N derived from an alkylene oxide adduct of a novolac type phenol resin.

Abstract: A wax dispersant for a toner including a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound, and a toner including a toner particle that contains a binder resin, a wax, and a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound.

Abstract: The present invention provides a toner that excels in low-temperature fixability and also maintains charging performance, storability, and anti-hot offset property even in long-term image output. The toner comprising a toner particle containing an amorphous polyester resin, a crystalline polyester resin, wax, and a colorant, wherein a weight-average molecular weight (Mw) of the crystalline polyester resin is 5000 to 14,000, and the crystalline polyester resin includes 0.5 mass % to 15.0 mass % of a segment derived from one or more aliphatic compounds selected from the group consisting of aliphatic monocarboxylic acids with a carbon number of 8 to 20 and aliphatic monohydric alcohols with a carbon number of 8 to 20.

Abstract: Provided is a toner, including toner particles each containing a binder resin containing a polyester ? as a main component, a colorant, a wax, and a crystalline polyester, in which: the polyester ? has a polyhydric alcohol unit and a polyvalent carboxylic acid unit; and the polyester ? has, as the polyhydric alcohol unit, a polyhydric alcohol unit N derived from an alkylene oxide adduct of a novolac type phenol resin.

Abstract: The present invention provides a magnetic carrier that can stably impart charge to a toner on a long term basis and that exhibits an excellent toner separation property and thus exhibits an excellent developing performance. This magnetic carrier is a magnetic carrier in which a vinyl resin coats the surface of a resin-filled core in which a resin is filled in pores of a porous ferrite particle, wherein the resistivity, Mg content, and total content of Sr and Ca oxides of the porous ferrite particle exhibit prescribed values and the magnetic carrier has a total area—in the backscattered electron projection image obtained by observation using a scanning electron microscope at an acceleration voltage of 2.0 kV—for a region originating with the porous ferrite particle of from at least 0.2 area % to not more than 5.0 area % with reference to the projected area of the magnetic carrier.

Abstract: A magnetic carrier having a resin-containing ferrite particles each containing a porous ferrite core and a resin in pores of the porous ferrite core, wherein the porous ferrite core has a particular pore diameter corresponding to the maximum logarithmic differential pore volume in a pore diameter range from at least 0.10 ?m to not more than 3.00 ?m, the resistivity of the porous ferrite core is in a particular range, and the porous ferrite core contains an oxide of Mg in a particular amount and contains a particular amount of a oxide of at least one metal selected from the group consisting of Mn, Sr, and Ca.

Abstract: Provided is a two-component developer containing: a magnetic carrier obtained by coating a magnetic core with a resin; and toner, in which: the magnetic core contains at least a ferrite component and at least one kind of an oxide selected from the group consisting of SiO2 and Al2O3; the content of the oxide is 4.0 mass % or more and 40.0 mass % or less with respect to the magnetic core; the magnetic core has a specific resistance of 5.0×104 ?·cm or more and 5.0×108 ?·cm or less at the time of the application of 1,000 V/cm; the magnetic carrier has an intensity of magnetization in 79.6 kA/m of 40.0 Am2/kg or more and 65.0 Am2/kg or less, and a residual magnetization after the application of an external magnetic field of 79.6 kA/m of 3.0 Am2/kg or less; and the toner has a weight-average particle diameter (D4) of 3.0 ?m or more and 10.0 ?m or less and an average circularity of 0.940 or more and 0.990 or less.

Abstract: An object of the present invention is to improve resistance to wraparound during fixing while achieving both low-temperature fixability and resistance to hot offset. A further object is to suppress image density variations and fogging in white background regions during use at high print coverage rate at high temperature and high humidity. A toner containing inorganic fine particles and toner particles containing a binder resin and a wax being provided, the toner being characterized in that the binder resin contains a polyester resin A obtained by condensation polymerization of a polyvalent carboxylic acid and an alcohol component mainly containing an aromatic diol and a polyester resin B obtained by condensation polymerization of a polyvalent carboxylic acid and an alcohol component mainly containing an aliphatic diol, and in that the degree of segregation of the wax in the toner depth direction from the toner surface toward the toner center is controlled.

Abstract: Provided is a magnetic carrier satisfactory in terms of the suppression of leakage and solid carrier adhesion, charge-providing performance, and developability. The magnetic carrier is a magnetic carrier, including filled core particles of which pores of porous magnetic core particles are filled with a filling resin composition, and having a surface coated with a coating resin composition, in which the coating resin composition comprises a coating resin and a carbon black, an amount of the coating resin composition is 2.0 parts by mass or more and 5.0 parts by mass or less with respect to 100.0 parts by mass of the filled core particles; and a particle diameter of the carbon black in the coating resin composition Pv at a maximum frequency in a particle size distribution based on a volume of the carbon black is 1.0 ?m or more and 10.0 ?m or less.

Abstract: The present invention provides an image of high image quality by using a magnetic carrier coated with a novel coating resin composition. Further, the present invention stably provides a good image which is hardly influenced by environmental fluctuation and long-term use and has a superior stability of a charging amount when left to stand especially under high temperature and high humidity environments. The present invention also provides a magnetic carrier characterized in that a carrier core surface is coated with a copolymer containing at least, as copolymerization components, an acrylic monomer having a specific structure and an acrylic macromonomer having a specific structure.