Abstract: Provided is a toner containing a colorant and a binder resin, wherein, in a wettability test of the toner with respect to a methanol/water mixed solvent, the methanol concentration when the transmittance of light at a wavelength of 780 nm is 50% is at least 5.0 volume % and not more than 30.0 volume %, and the interparticle force measured by rupturing a consolidation of the toner formed by compression of the toner with a load of 78.5 N is at least 1.0 nN and not more than 25.0 nN.

Abstract: A toner including: a toner particle including a toner base particle containing a binder resin, and an organosilicon condensate present on a surface of the toner base particle, wherein a charge attenuation constant of the toner is 3.5×10?3 or more to 1.0×100 or less.

Abstract: Provided is a toner, including a toner particle containing a toner base particle and a fine particle, wherein the fine particle includes a composite particle each having a surface covered with a condensation product of at least one kind of organosilicon compound selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (2), wherein the fine particle is stuck in a state of being embedded in a surface of the toner base particle, and wherein a coverage of a composition containing the organosilicon compound with respect to the surface of the toner base particle excluding the fine particle is 0.1% by area or more and 40.

Abstract: There is provided a method of manufacturing a toner including a toner particle containing a binder resin, the method including: process 1: preparing a mixed solution including the following components i) to iii) in an aqueous medium: i) a particular silicon compound, ii) a fine particle having a number average particle diameter of 3 nm or more and 500 nm or less, and iii) a toner base particle containing the binder resin; and process 2: adjusting a pH of the mixed solution to 7.0 or more and 12.0 or less to condense the silicon compound, wherein the fine particle has an absolute value of zeta potential of 10.0 mV or more at the pH of the mixed solution of process 1.

Abstract: A first aspect is a toner production method in which an organosilicon compound is condensed in a surfactant-containing aqueous medium with a specific surface tension, in which a resin particle is dispersed, to produce a toner having the condensate of the organosilicon compound on the surface of the resin particle, and a second aspect is a toner production method in which an organosilicon compound is condensed in an aqueous medium which has a surfactant and a specific metal salt and in which a resin particle is dispersed, to produce a toner having the condensate of the organosilicon compound on the surface of the resin particle.

Abstract: A toner comprising a binder resin and a colorant, wherein the toner has a Martens hardness, as measured at a maximum load condition of 2.0×10?4 N, of from 200 MPa to 1,100 MPa.

Abstract: Provided is a toner comprising a toner particle including a toner base particle and fine particles present on a surface of the toner base particle, wherein each of the fine particles includes a core fine particle and a condensate of at least one organosilicon compound selected from the group consisting of organosilicon compounds represented by specific structural formulas, the condensate coating the surface of the core fine particle, and in a wettability test of the toner with respect to a methanol/water mixed solvent, a methanol concentration, when a transmittance of light having a wavelength of 780 nm is 50%, is 5.0 to 20.0% by volume: in above Formulas, each of Ra, Rb and Rc independently represents an alkyl group, an alkenyl group, an acetoxy group, an acyl group, an aryl group, or a methacryloxyalkyl group, R1 to R5 each independently represents a halogen atom or an alkoxy group.

Abstract: A toner comprising a toner particle that contains a binder resin and a release agent, wherein the toner particle has a surface layer that contains an organosilicon polymer and the luminance histogram of a backscattered electron image of the toner particle has two peak values P1 and P2 and a minimum value V between P1 and P2, P2 originates from the organosilicon polymer, and the luminance giving P1 and P2 are in specific ranges, percentages for P1 and P2 are each at least 0.50%, and using the luminance Bl at V as a reference point, specific relationships are satisfied by A1, AV, and A2, where A1 is the total number of pixels at luminance from 0 to (Bl?30), AV is the total number of pixels at luminance from (Bl?29) to (Bl+29), and A2 is the total number of pixels at luminance from (Bl+30) to 255.

Abstract: Provided is a toner, including a toner particle having: a toner base particle containing a binder resin and a colorant; and protrusion derived from a resin fine particle in a surface of the toner base particle, wherein the protrusion is covered with a condensation product of an organosilicon compound represented by the formula (1), and wherein the resin fine particle is in direct contact with the toner base particle.

Abstract: A toner including toner particles containing a binder resin, a pigment, a crystalline resin and an amorphous resin. The adsorption rate A1 of the crystalline resin to the pigment is from 5% to 40%, and the adsorption rate A2 of the amorphous resin to the pigment is from 20% to 60%. The adsorption rates A1 and A2 satisfy relationship (1): A1<A2.

Abstract: A toner including a toner particle containing a binder resin, a pigment, a pigment dispersant and an amorphous resin, in which the pigment dispersant has a rate of adsorption A1 (%) to the pigment of at least 80% and not more than 100%, the amorphous resin has a rate of adsorption A2 (%) to the pigment of at least 0% and not more than 60%, the binder resin has an Rf value (RfL) of at least 0.50 and not more than 1.00, and the amorphous resin has an Rf value (RfH) of at least 0.00 and not more than 0.35.

Abstract: Provided is a method of producing a toner including a toner particle, the method including: a granulation step of mixing a polymerizable monomer composition containing a polymerizable monomer and an aqueous medium to form a suspension of particles of the polymerizable monomer composition; and a polymerization step of polymerizing the polymerizable monomer in each of the particles of the polymerizable monomer composition in the presence of a metal phosphate containing aluminum as a metal element to provide the toner particle, the content ratio of aluminum in the metal phosphate containing aluminum being 1.0 mol % or more and 95.0 mol % or less with respect to all metal elements, the metal phosphate containing aluminum being obtained by adding an aluminum compound to the aqueous medium and/or the suspension.

Abstract: Provided is a method of producing a toner including a toner particle, the method including: a granulation step of mixing a polymerizable monomer composition containing a polymerizable monomer and an aqueous medium to form a suspension of particles of the polymerizable monomer composition; and a polymerization step of polymerizing the polymerizable monomer in each of the particles of the polymerizable monomer composition in the presence of a metal phosphate containing aluminum as a metal element to provide the toner particle, the content ratio of aluminum in the metal phosphate containing aluminum being 1.0 mol % or more and 95.0 mol % or less with respect to all metal elements, the metal phosphate containing aluminum being obtained by adding an aluminum compound to the aqueous medium and/or the suspension.

Abstract: A toner including a toner particle containing a binder resin, a pigment, a pigment dispersant and an amorphous resin, in which the pigment dispersant has a rate of adsorption A1(%) to the pigment of at least 80% and not more than 100%, the amorphous resin has a rate of adsorption A2(%) to the pigment of at least 0% and not more than 60%, the binder resin has an Rf value (RfL) of at least 0.50 and not more than 1.00, and the amorphous resin has an Rf value (RfH) of at least 0.00 and not more than 0.35.

Abstract: A toner including toner particles containing a binder resin, a pigment, a crystalline resin and an amorphous resin. The adsorption rate A1 of the crystalline resin to the pigment is from 5% to 40%, and the adsorption rate A2 of the amorphous resin to the pigment is from 20% to 60%. The adsorption rates A1 and A2 satisfy relationship (1): A1<A2.

Abstract: The invention provides a toner that is capable of low-temperature fixing even in high-speed electrophotographic processes while keeping the cleaning performance when used at high temperatures and the high-temperature storage stability. This toner having toner particles, each of which contains a binder resin and a colorant is characterized in that the temperature of Tp [° C.] when the loss elastic modulus obtained by dynamic viscoelastic measurements on the toner exhibits a maximum value in the temperature range from at least 30° C. to not more than 200° C., is from at least 40° C. to not more than 55° C., and in that, with G?(Tp) [Pa] being this maximum value, G?(Tp+15) [Pa] being the loss elastic modulus at the temperature of Tp+15 [° C.], and G?(Tp+30) [Pa] being the loss elastic modulus at the temperature of Tp+30 [° C.], G?(Tp), G?(Tp+15), and G?(Tp+30) satisfy prescribed relationships.

Abstract: In a toner including toner particles obtained by performing suspension polymerization using a monomer composition containing a polymerizable monomer and a polar resin and in a method for manufacturing the above toner, the polar resin satisfies the following conditions (1) to (4). (1) The polar resin is a styrene-based resin. (2) A main peak molecular weight Mp is 5,000 to 100,000. (3) When the acid value of a low molecular weight component is represented by A and the acid value of a high molecular weight component is represented by B, 0.80?A/B?1.20 is satisfied. (4) The acid value is 5.0 to 40.0 mgKOH/g.

Abstract: A toner includes a toner particle, which contains at least a binding resin, a colorant, and two types of polar resins, i.e., a polar resin H and a polar resin L, and which is obtained with granulation in a water-based medium, wherein solubility parameters, glass transition points, and weight-average molecular weights of the binding resin, the polar resin H, and the polar resin L, as well as amounts of the added resins satisfy respective specific relationships.

Abstract: The invention provides a toner that is capable of low-temperature fixing even in high-speed electrophotographic processes while keeping the cleaning performance when used at high temperatures and the high-temperature storage stability. This toner having toner particles, each of which contains a binder resin and a colorant is characterized in that the temperature of Tp [° C.] when the loss elastic modulus obtained by dynamic viscoelastic measurements on the toner exhibits a maximum value in the temperature range from at least 30° C. to not more than 200° C., is from at least 40° C. to not more than 55° C., and in that, with G?(Tp) [Pa] being this maximum value, G?(Tp+15) [Pa] being the loss elastic modulus at the temperature of Tp+15 [° C.], and G?(Tp+30) [Pa] being the loss elastic modulus at the temperature of Tp+30 [° C.], G?(Tp), G?(Tp+15), and G?(Tp+30) satisfy prescribed relationships.

Abstract: A toner includes a toner particle, which contains at least a binding resin, a colorant, and two types of polar resins, i.e., a polar resin H and a polar resin L, and which is obtained with granulation in a water-based medium, wherein solubility parameters, glass transition points, and weight-average molecular weights of the binding resin, the polar resin H, and the polar resin L, as well as amounts of the added resins satisfy respective specific relationships.