Toners are provided which may comprise toner particles, a colorant, and optionally, a wax, wherein the toner particles comprise a resin comprising a polymerization product of reactants comprising a dioxane/dioxolane monomer and a vinyl co-monomer, wherein the dioxane/dioxolane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxolane moiety, or both.

Toners are provided which may comprise toner particles, a colorant, and optionally, a wax, wherein the toner particles comprise a resin comprising a polymerization product of reactants comprising a dioxane/dioxolane monomer and a vinyl co-monomer, wherein the dioxane/dioxolane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxolane moiety, or both.

A lustrous developer according to an embodiment may include: a metallic pigment; and a binder resin. The lustrous developer includes small diameter particles smaller than a volume median diameter of the metallic pigment. A ratio of a volume of particles other than the small diameter particles in the lustrous developer to a volume of the entire lustrous developer is 90.297% or more and 99.314% or less. The volume median diameter of the metallic pigment is 5.91 μm or less.

Toners are provided which may comprise toner particles, a colorant, and optionally, a wax, wherein the toner particles comprise a resin comprising a polymerization product of reactants comprising a dioxane/dioxolane monomer and a vinyl co-monomer, wherein the dioxane/dioxolane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxolane moiety, or both.

Toners are provided which may comprise toner particles, a colorant, and optionally, a wax, wherein the toner particles comprise a resin comprising a polymerization product of reactants comprising a dioxane/dioxolane monomer and a vinyl co-monomer, wherein the dioxane/dioxolane monomer is an ester of (meth)acrylic acid with an alcohol comprising a dioxane moiety, an ester of (meth)acrylic acid with an alcohol comprising a dioxolane moiety, or both.

Disclosed is a compound containing a specific structure having an azomethine part, the compound being reversibly fluidized and non-fluidized by being irradiated with light.

A pigment composition contains: an azo pigment that is a reaction product between a coupler and a base; and a pigment derivative, and a content of o-anisidine derived from the coupler is less than or equal to 20 mg/kg in the entire pigment composition. A method for producing the pigment composition includes, after reaction between a coupler and a base to generate an azo pigment, or during the reaction between the coupler and the base, adding a remover for o-anisidine derived from the coupler.

The present invention relates to a toner for development of electrostatic images which contains a colorant, a resin composition (P) and a resin composition (W), in which the resin composition (P) is a resin composition formed by subjecting an acid group-containing amorphous polyester-based resin (A) and an amine compound to condensation reaction, and the resin composition (W) is a resin composition formed by subjecting an alcohol component (W-al), a carboxylic acid component (W-ac) and a hydrocarbon wax containing at least one functional group selected from the group consisting of a hydroxy group and a carboxy group to condensation reaction; and a process for producing the toner.

A toner contains a crystalline polyester resin, a non-crystalline polyester resin A having a melting temperature ranging between 99° C. to 108° C., a non-crystalline polyester resin B having a melting temperature ranging between 140° C. to 150° C., an ester wax, and a colorant. A ratio of the crystalline polyester resin is 5% mass to 15% mass to a total T of the crystalline polyester resin, the non-crystalline polyester resin A, the non-crystalline polyester resin B, the ester wax, and the colorant. A ratio of the non-crystalline polyester resin A to the total T is between 50% mass to 60% mass. A ratio of the non-crystalline polyester resin B to the total T is between 20% mass to 30% mass.

A two-component developer includes an electrostatic image developing toner and a carrier, and the electrostatic image developing toner contains toner particles having toner base particles and an external additive. The toner base particles contain a colorant, the colorant contains a pigment P1 and a pigment P2, the absorption maximum wavelength λmax of the pigments P1 and P2 each in dispersion in methyl ethyl ketone is, 400 nm or more and less than 600 nm for the pigment P1 and 600 nm or more and 700 nm or less for the pigment P2, the external additive contains titanium oxide, the content of the titanium oxide is 0.01% by mass or more and less than 1.00% by mass based on the total mass of the toner base particles, and the iron element content (atomic %) of the surface of the carrier as measured by X-ray electron spectroscopy satisfies a specific expression.