Provided is a toner comprising a toner particle containing a binder resin, a resin A, and a pigment, wherein the resin A has a pKa of at least 6.0 and not more than 9.0, and also has a hydrophobic parameter HPA of at least 0.65 and not more than 0.95.

Provided is a means that can improve performance such as high-speed fixability and fixable temperature range while securing low temperature fixability, in an electrostatic charge image developing toner concurrently using a crystalline resin and an amorphous resin as binder resins constituting toner base particles. An electrostatic charge image developing toner containing toner base particles containing an amorphous resin and a crystalline resin is constituted such that lamellar crystal structures and fibrous crystal structures are dispersed in the cross section of the toner base particles.

Fluorescent green toners are provided. In embodiments, a fluorescent green toner comprises fluorescent agent-incorporated resin particles comprising a resin, a fluorescence brightener, and a yellow fluorescent agent having an absorption spectrum that overlaps with a fluorescence emission spectrum of the fluorescence brightener; and a cyan colorant; blue dye-incorporated resin particles comprising the resin and a blue dye; or both. The fluorescent green toner has a weight ratio of the yellow fluorescent agent to the cyan colorant and, if present, the blue dye, in a range of from 100:1 to 0.2:1, and the fluorescent green toner exhibits Förster Resonance Energy Transfer (FRET) under illumination with UV light. Methods of making and using the fluorescent green toners are also provided.

Methods of making fluorescent pink toners are provided which comprise forming one or more fluorescent latexes which comprise a red fluorescent agent, a yellow fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent pink toner. Fluorescent pink toners and methods of using such toners are also provided.

A toner is provided comprising toner particles each comprising: a toner base particle containing an inorganic filler; and an external additive. A relation 0.30≤S2/S1≤0.70 is satisfied, where S1 and S2 respectively represent an area of the toner base particle and a total area of the inorganic filler exposed at a surface of the toner base particle. A standard deviation SD of an area distribution of S2 is less than 0.040 μm.sup.2. A volume average particle diameter of the toner is 4.0 μm or more and less than 6.0 μm. A relation B/A≥0.7 is satisfied, where A and B are respectively average values of Q1/D1 and Q2/D2, where Q1 and D1 are respectively a charge amount and a particle diameter of the toner particle having a size of 4.0 μm or more and less than 6.0 μm, and Q2 and D2 are those of the toner particle having a size of 6.0 μm or more and less than 8.0 μm.

Methods of making a fluorescent white toner are provided. In embodiments, such a method comprises forming one or more fluorescent latexes which comprise a fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; a dispersion comprising a white colorant and a surfactant; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent white toner. The fluorescent white toners and methods of using such toners are also provided.

Methods of making fluorescent metallic toners are provided which comprise forming one or more fluorescent latexes which comprise a fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; a dispersion comprising aluminum flakes and a surfactant; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent metallic toner. Fluorescent metallic toners and methods of using such toners are also provided.

A production method of a toner having a toner particle that contains a binder resin and an external additive that is externally added to the toner particle, wherein the production method has a toner particle dispersion step of obtaining a toner particle dispersion by dispersing the toner particle and an inorganic dispersant in an aqueous medium; and an external addition step of externally adding the external additive to the toner particle through addition of the external additive to the toner particle dispersion.

The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan δ maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan δ maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.

A method for manufacturing a toner includes a pigment crushing step of kneading a pigment, a binder, and a grinding agent to obtain a pigment dispersion in which the grinding agent and the crushed pigment are dispersed in the binder; and a step of obtaining toner particles by a predetermined method using the pigment dispersion. The binder and the grinding agent are contained in the resulting toner particles.