Abstract: A magnetic toner includes toner particles. The toner particles each include a toner mother particle and an external additive attached to a surface of the toner mother particle. The toner mother particles contain a binder resin and a magnetic powder. The external additive includes resin particles as external additive particles. The resin particles have a blocking rate of no greater than 40% by mass. The resin particles have a number average primary particle diameter of at least 40 nm and no greater than 120 nm. A resin constituting the resin particles is a vinyl resin including repeating units represented by general formulas (1) and (2), and a repeating unit derived from a sulfo group-containing vinyl compound. The content of the repeating unit derived from the sulfo group-containing vinyl compound in the vinyl resin is at least 0.1 mol % and no greater than 3.

Abstract: A toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and an external additive. The external additive includes resin particles. The toner mother particles have a chargeability opposite to a chargeability of the resin particles. Each of the resin particles has an embedded portion embedded in a surface portion of the toner mother particle and a protruding portion protruding outward from the toner mother particle in a radial direction of the toner mother particle. In a cross section of the resin particle, a relationship 0.60?LA/(LA+LB)?0.80 is satisfied where LA represents a maximum length of the embedded portion in the radial direction of the toner mother particle and LB represents a maximum length of the protruding portion in the radial direction of the toner mother particle.

Abstract: A magnetic toner includes toner particles. The toner particles each include a toner mother particle and an external additive attached to a surface of the toner mother particle. The toner mother particles contain a binder resin and a magnetic powder. The external additive includes resin particles as external additive particles. The resin particles have a blocking rate of no greater than 40% by mass. The resin particles have a number average primary particle diameter of at least 40 nm and no greater than 120 nm. A resin constituting the resin particles is a vinyl resin including repeating units represented by general formulas (1) and (2), and a repeating unit derived from a sulfo group-containing vinyl compound. The content of the repeating unit derived from the sulfo group-containing vinyl compound in the vinyl resin is at least 0.1 mol % and no greater than 3.

Abstract: A toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and an external additive. The external additive includes resin particles. The toner mother particles have a chargeability opposite to a chargeability of the resin particles. Each of the resin particles has an embedded portion embedded in a surface portion of the toner mother particle and a protruding portion protruding outward from the toner mother particle in a radial direction of the toner mother particle. In a cross section of the resin particle, a relationship 0.60?LA/(LA+LB)?0.80 is satisfied where LA represents a maximum length of the embedded portion in the radial direction of the toner mother particle and LB represents a maximum length of the protruding portion in the radial direction of the toner mother particle.

Abstract: A toner includes toner particles. The toner particles each include a core, a shell layer, and an external additive. The core contains a first thermoplastic resin as a binder resin. The shell layer partially covers a surface of the core. The external additive is attached to regions of the surface of the core that are not covered with the shell layer. The external additive includes external additive particles. The external additive particles protrude outward in radial directions of the core further than a surface of the shell layer. At least part of surfaces of the external additive particles is exposed from the shell layer. The shell layer contains a second thermoplastic resin or a thermosetting resin. The second thermoplastic resin has a higher softening point than the core. The shell layer has a thickness of at least 5 nm.

Abstract: A toner includes toner particles. The toner particles each include a core, a shell layer, and an external additive. The core contains a first thermoplastic resin as a binder resin. The shell layer partially covers a surface of the core. The external additive is attached to regions of the surface of the core that are not covered with the shell layer. The external additive includes external additive particles. The external additive particles protrude outward in radial directions of the core further than a surface of the shell layer. At least part of surfaces of the external additive particles is exposed from the shell layer. The shell layer contains a second thermoplastic resin or a thermosetting resin. The second thermoplastic resin has a higher softening point than the core. The shell layer has a thickness of at least 5 nm.

Abstract: Toner particles each include a toner mother particle and a plurality of C/S external additive particles. The toner mother particle contains a polyester resin. The C/S external additive particles each adhere to a surface of the toner mother particle and include a core particle and a plurality of shell particles. The shell particles each adhere to a surface of the core particle. The shell particles have a number average primary particle diameter of no greater than 0.40 times a number average primary particle diameter of the core particles. The core particles and the shell particles each contain a resin. The core particles have a hydrophobicity degree of at least 30%. The shell particles have a hydrophobicity degree of no greater than 5%. The C/S external additive particles have a hydrophobicity degree of at least 15% and no greater than 25%.

Abstract: Toner particles each include a toner mother particle and a plurality of C/S external additive particles. The toner mother particle contains a polyester resin. The C/S external additive particles each adhere to a surface of the toner mother particle and include a core particle and a plurality of shell particles. The shell particles each adhere to a surface of the core particle. The shell particles have a number average primary particle diameter of no greater than 0.40 times a number average primary particle diameter of the core particles. The core particles and the shell particles each contain a resin. The core particles have a hydrophobicity degree of at least 30%. The shell particles have a hydrophobicity degree of no greater than 5%. The C/S external additive particles have a hydrophobicity degree of at least 15% and no greater than 25%.

Abstract: An electrostatic latent image developing toner includes toner particles each including a core and a shell layer. The shell layer is a collection of resin particles having the same composition (primary particle diameter of at least 90% by number of the resin particles: 20 nm-30 nm). The shell layer includes a first shell layer, which is a film including the resin particles in a non-aggregated state, and a second shell layer, which is a plurality of particle aggregates (secondary particle diameter of at least 90% by number of the particle aggregates: 100 nm-150 nm). The particle aggregates each include the resin particles in an aggregated state. The surface of the core is entirely covered with the shell layer. The second shell layer is present in a surface of the toner particle in a proportion of at least 5% by area and no greater than 15% by area.

Abstract: An electrostatic latent image developing toner includes toner particles each including a core and a shell layer disposed over a surface of the core. The shell layer contains first resin particles having a number average particle diameter of 60 nm to 100 nm and second resin particles having a number average particle diameter of 10 nm to 50 nm. A particle diameter difference obtained by subtracting the number average particle diameter of the second resin particles from the number average particle diameter of the first resin particles is +20 nm to +50 nm. The first resin particles contain a charge control agent. The first resin particles have a higher softening point than the second resin particles. A ratio of a mass of the first resin particles to a sum of the mass of the first resin particles and a mass of the second resin particles is 0.7 to 0.9.

Abstract: An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×104 Pa·s and no greater than 1.0×105 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.

Abstract: An electrostatic latent image developing toner includes toner particles each including a core and a shell layer. The shell layer is a collection of resin particles having the same composition (primary particle diameter of at least 90% by number of the resin particles: 20 nm-30 nm). The shell layer includes a first shell layer, which is a film including the resin particles in a non-aggregated state, and a second shell layer, which is a plurality of particle aggregates (secondary particle diameter of at least 90% by number of the particle aggregates: 100 nm-150 nm). The particle aggregates each include the resin particles in an aggregated state. The surface of the core is entirely covered with the shell layer. The second shell layer is present in a surface of the toner particle in a proportion of at least 5% by area and no greater than 15% by area.

Abstract: An electrostatic latent image developing toner includes toner particles each including a core and a shell layer disposed over a surface of the core. The shell layer contains first resin particles having a number average particle diameter of 60 nm to 100 nm and second resin particles having a number average particle diameter of 10 nm to 50 nm. A particle diameter difference obtained by subtracting the number average particle diameter of the second resin particles from the number average particle diameter of the first resin particles is +20 nm to +50 nm. The first resin particles contain a charge control agent. The first resin particles have a higher softening point than the second resin particles. A ratio of a mass of the first resin particles to a sum of the mass of the first resin particles and a mass of the second resin particles is 0.7 to 0.9.

Abstract: An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×104 Pa·s and no greater than 1.0×105 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.