Abstract: An electrostatic charge image developing toner contains toner particles that contain an organic colorant and a binder resin, in which the organic colorant includes a non-fluorescent organic pigment and a fluorescent organic pigment, a total content of the organic colorant is 5% by mass or more and 20% by mass or less with respect to a total mass of the toner particles, and a specific gravity D1 of the non-fluorescent organic pigment and a specific gravity D2 of the fluorescent organic pigment satisfy both of Formulas (1) and (2). D1?2.0??Formula (1) D1?D2?0.6??Formula (2).

Abstract: A fluorescent green toner contains toner particles containing a binder resin, a release agent, a fluorescent pigment having a hydrophilic group, and a pigment having a halogen atom.

Abstract: An electrostatic charge image developing green toner contains green toner particles containing a binder resin, an azomethine fluorescent pigment having an emission peak in a wavelength region of 500 nm or more and 550 nm or less in an emission spectrum, and a non-fluorescent pigment having a reflection peak in a wavelength region of 480 nm or more and 540 nm or less in a reflection spectrum, in which a mass-based ratio M2/M1 of a content M2 of the non-fluorescent pigment to a content M1 of the azomethine fluorescent pigment is 0.05 or more and 1.5 or less, and a total content of the azomethine fluorescent pigment and the non-fluorescent pigment with respect to a total amount of the green toner particles is 5% by mass or more and 15% by mass or less.

Abstract: A method for producing resin particles includes drying resin particles in a wet state by passing, without circulating, the resin particles through a drying tube together with a first gas, the resin particles being ones that undergo pressure-induced phase transition. The drying tube has an inlet through which the resin particles are fed into the drying tube, at least one gas blowhole through which a second gas is blown over the resin particles passing through the drying tube, and an outlet through which the resin particles are ejected from the drying tube, and the second gas is blown out of the gas blowhole at a velocity of 50 m/s or more.

Abstract: A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 ?m or more and 1 ?m or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.

Abstract: A method for producing a toner for developing an electrostatic charge image includes aggregating at least resin particles contained in a dispersion to form aggregated particles; and heating and fusing the aggregated particles to form fused particles, in which, in the aggregating, aggregation is performed by taking out a portion of the dispersion containing the resin particles mixed in a stirring vessel, adding an aggregating agent aqueous solution thereto, passing the resulting mixture through a dispersing machine, and then returning the resulting mixture to the stirring vessel so as to circulate the dispersion, and when adding the aggregating agent aqueous solution, an aqueous solution containing an aggregating agent at a concentration of 0.1 mass % or more and 5 mass % or less is added at a flow rate q (L/min) such that a ratio of this flow rate q (L/min) to a flow rate Q (L/min) of the mixture returning from the dispersing machine to the stirring vessel is 0.01 or more and 0.1 or less.

Abstract: A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles, The aggregating includes stirring the dispersion in the aggregating at a required stirring power of 1.0 kW/m3 or more and 6.0 kW/m3 or less per unit volume, and the preparing method satisfies the following Requirement (1), in which Requirement (1): a viscosity of the dispersion during the stirring is 5 Pa·s or more and 50 Pa·s or less at a shear rate of 1/s, where the viscosity of the dispersion is measured at a sample temperature of 25° C. using a part of the dispersion as a sample.

Abstract: A resin fine particle includes a polyester resin; and a basic dye, in which an volume average particle diameter of the resin fine particle is 0.05 ?m or more and 1 ?m or less, and a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle is 0.8 or more.

Abstract: An electrostatic-image developing toner contains toner particles containing a polyester resin having an acid value of from 10 mg KOH/g to less than 15 mg KOH/g. The toner particles have a surface with an acid value in a range from 0.3% to 1.7% of the acid value of the polyester resin. The toner particles have a melt viscosity of from 1,800 Pa·s to 3,800 Pa·s at 100° C.

Abstract: An electrostatic charge image developer includes: a toner that includes toner particles which contain a polyester resin and a styrene (meth)acrylic resin and form a sea-island structure which includes a sea portion containing the polyester resin and an island portion containing the styrene (meth)acrylic resin on a surface of the toner particle, and has an exposure rate of the styrene (meth)acrylic resin in a range of from about 5 atom % to about 20 atom %; and an external additive, and a carrier whose fluidity and bulk density under environment of a temperature of 25° C. and a humidity of 50% satisfy Expression: 65.0?fluidity×bulk density?72.5.

Abstract: An electrostatic charge image developing toner includes toner particles that contain a polyester resin which includes a condensed polymer of a polyvalent carboxylic acid and a polyol which contains ethylene glycol in an amount of from about 40% by weight to about 90% by weight with respect to a total amount of the polyol, and an external additive that contains silica particles in which a product of a volume average particle diameter D50 (nm) and a BET specific surface area SA (m2/g) is from about 1.4×103 to about 5.0×103.

Abstract: An electrostatic-image developing toner contains toner particles containing a polyester resin having an acid value of from 10 mg KOH/g to less than 15 mg KOH/g. The toner particles have a surface with an acid value in a range from 0.3% to 1.7% of the acid value of the polyester resin. The toner particles have a melt viscosity of from 1,800 Pa·s to 3,800 Pa·s at 100° C.

Abstract: An electrostatic charge image developer includes: a toner that includes toner particles which contain a polyester resin and a styrene (meth)acrylic resin and form a sea-island structure which includes a sea portion containing the polyester resin and an island portion containing the styrene (meth)acrylic resin on a surface of the toner particle, and has an exposure rate of the styrene (meth)acrylic resin in a range of from about 5 atom % to about 20 atom %; and an external additive, and a carrier whose fluidity and bulk density under environment of a temperature of 25° C. and a humidity of 50% satisfy Expression: 65.0?fluidity×bulk density?72.5.

Abstract: An electrostatic charge image developing toner includes toner particles that contain a polyester resin which includes a condensed polymer of a polyvalent carboxylic acid and a polyol which contains ethylene glycol in an amount of from about 40% by weight to about 90% by weight with respect to a total amount of the polyol, and an external additive that contains silica particles in which a product of a volume average particle diameter D50 (?m) and a BET specific surface area SA (m2/g) is from about 1.4×103 to about 5.0×103.