Patent classifications
G03G9/092
Magenta toner
Provided is a magenta toner which exhibits high image density and chroma, has excellent low-temperature fixability, shelf stability and charging ability, is unlikely to fog, and can be produced at low cost. The magenta toner contains a binder resin and a magenta colorant, wherein the magenta toner contains C.I. Pigment Red 122, C.I. Pigment Violet 19 and a compound A represented by the following general formula (1) as the magenta colorant, and wherein, with respect to 100 parts by mass of the binder resin, a total of from 3 to 30 parts by mass of the C.I. Pigment Red 122, the C.I. Pigment Violet 19 and the compound A are contained, and a mass ratio of a total content of the C.I. Pigment Red 122 and the C.I. Pigment Violet 19 to a content of the compound A {(PR122+PV19)/the compound A} is from 1 to 20: ##STR00001##
TONER CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS
A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source. The toner container including a container body, and a cyan toner stored in the container body. The cyan toner includes a binder resin, at least one pigment, a charge control agent, and an external additive. The at least one pigment includes at least Pigment Blue. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy: 30.04L*33.68, 1.75a*0.71, and 47.47b*45.08.
IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE HAVING ELECTROSTATIC IMAGE DEVELOPING TONER WITH SPECIFIED VISCOSITY
An image forming apparatus includes an image carrier; a charging unit that charges a surface of the image carrier; an electrostatic image forming unit that forms an electrostatic image on the charged surface of the image carrier; a developing unit that includes a container and a supply member and develops the electrostatic image formed on the surface of the image carrier to form a toner image, the container containing an electrostatic image developer that contains an electrostatic image developing toner and a carrier, the supply member having in a circumferential surface thereof plural grooves extending in a direction intersecting a direction of rotation of the supply member, the electrostatic image being developed with the electrostatic image developer; a transfer unit that transfers the toner image formed on the surface of the image carrier to a recording medium; and a fixing unit that fixes the toner image transferred to the recording medium. The electrostatic image developing toner satisfies the following inequalities: (ln (T1)ln (T2))/(T1T2)0.14, (ln (T2)ln (T3))/(T2T3)0.15, and (ln (T1)ln (T2))/(T1T2)<(ln (T2)ln (T3))/(T2T3), wherein (T1) represents a viscosity of the electrostatic image developing toner at 60 C., (T2) represents a viscosity of the electrostatic image developing toner at 90 C., and (T3) represents a viscosity of the electrostatic image developing toner at 130 C.
Use of novel naphthol AS-pigment-mixtures in printing-materials
The invention relates to the use of pigment mixtures which contain at least one pigment of formulas (la) and (lb), wherein variables X.sup.1, X.sup.2, X.sup.3, X.sup.4, Y.sup.1, Y.sup.2, Z.sup.1 and Z.sup.2 are as ##STR00001##
defined and wherein the pigment mixtures are useful as dyes in printing methods.
ELECTROSTATIC-IMAGE DEVELOPING TONER, ELECTROSTATIC-IMAGE DEVELOPER, AND TONER CARTRIDGE
An electrostatic-image developing toner includes toner particles including a binder resin including an amorphous resin including a polyester resin segment and a styrene acrylate resin segment and a release agent. The content of 5-chloro-3-hydroxy-2-methoxy-2-naphthanilide in the electrostatic-image developing toner is 1,000 ppm by mass or less.
MAGENTA TONER
Provided is a magenta toner which is more excellent in durability in a high temperature and high humidity environment than conventional ones. The magenta toner comprises a binder resin, a magenta colorant, a release agent and an external additive, wherein a compound A, a compound B and a compound C each having a specific chemical structure are contained as the magenta colorant, and wherein the release agent has a maximum endothermic peak in a range of from 70 C. to 80 C. during temperature increase, in a DSC curve measured by a differential scanning calorimeter.
TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, ELECTROSTATIC IMAGE DEVELOPER, AND TONER CARTRIDGE
A toner for electrostatic image development includes: a binder resin; and a coloring agent. When an image with a toner mass per unit area of 4.0 g/m.sup.2 is formed using the toner, the image has a color that satisfies the following conditions (A), (B), and (C): (A) L* is from 37 to 50 inclusive; (B) is from 12 to 8 inclusive; and (C) b* is from 49 to 40 inclusive.
Electrostatic-image developing toner, electrostatic-image developer, and toner cartridge
An electrostatic-image developing toner includes toner particles including a binder resin including an amorphous resin including a polyester resin segment and a styrene acrylate resin segment and a release agent. The content of 5-chloro-3-hydroxy-2-methoxy-2-naphthanilide in the electrostatic-image developing toner is 1,000 ppm by mass or less.
Toner for electrostatic image development, electrostatic image developer, and toner cartridge
A toner for electrostatic image development includes: a binder resin; and a coloring agent. When an image with a toner mass per unit area of 4.0 g/m.sup.2 is formed using the toner, the image has a color that satisfies the following conditions (A), (B), and (C): (A) L* is from 37 to 50 inclusive; (B) a* is from 12 to 8 inclusive; and (C) b* is from 49 to 40 inclusive.
MAGENTA TONER
Provided is a magenta toner which exhibits high image density and chroma, has excellent low-temperature fixability, shelf stability and charging ability, is unlikely to fog, and can be produced at low cost. The magenta toner contains a binder resin and a magenta colorant, wherein the magenta toner contains C.I. Pigment Red 122, C.I. Pigment Violet 19 and a compound A represented by the following general formula (1) as the magenta colorant, and wherein, with respect to 100 parts by mass of the binder resin, a total of from 3 to 30 parts by mass of the C.I. Pigment Red 122, the C.I. Pigment Violet 19 and the compound A are contained, and a mass ratio of a total content of the C.I. Pigment Red 122 and the C.I. Pigment Violet 19 to a content of the compound A {(PR122+PV19)/the compound A} is from 1 to 20:
##STR00001##