Ricoh Company, Ltd.

Yu Naito

Kazumi Suzuki

Yoshitaka Yamauchi

Toyoshi Sawada

Hisashi Nakajima

Saori Yamada

Masashi Nagayama

Akihiro Kaneko

Natsuko Matsushita

Yoshitaka Sekiguchi

Provided is a toner including a binder resin and a colorant, wherein the colorant includes Solvent Red 49, and an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

Toner, toner stored unit, image forming apparatus, and image forming method

A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.

Toner, toner set, toner accommodating unit, image forming method, and image forming apparatus

A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2&#x3b8; is from 20&#xb0; through 25&#xb0;, and a difference between Tg1 and Tg2 is 10&#xb0; C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.

Toner, image forming apparatus, and toner stored unit

A toner set for use in an image forming apparatus is provided. The toner set includes a fluorescent toner and a color toner. The fluorescent toner comprises a binder resin and a fluorescent agent. The color toner comprises a binder resin and a colorant. A 60-degree gloss value (Gf) of a solid image of the fluorescent toner is in a range of from 10 to 25, and a difference (Gn&#x2212;Gf) between a 60-degree gloss value (Gn) of a solid image of the color toner and the 60-degree gloss value (Gf) of the solid image of the fluorescent toner is in a range of from 10 to 28.

Toner set, image forming apparatus, and image forming method

A toner includes a europium complex represented by the following Chemical formula  where A represents 2-naphthyl group, 2-naphthyl group having a substitution group selected from the group consisting of an alkyl group, an alkoxy group, and a halogen, R represents a fluoroalkyl group having one to three carbon atoms or a methyl group, and R, R, R, and Reach, independently represent hydrogen atoms, alkyl groups, or aryl groups, wherein the toner has a hydroxyl value of from 20 to 40 mgKOH/g.

Toner, image forming apparatus, image forming method, and toner accommodating unit

A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95&#xb0; C. to 115&#xb0; C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan &#x3b4;)=loss elastic modulus (G&#x2033;)/storage elastic modulus (G').

Toner for electrophotography, image forming method, and process cartridge

Toner contains a binder resin, a releasing agent, and a tri- or higher metal salt, wherein the toner has a weight average molecular weight (Mw) of from 7,000 to 10,000, a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn) of 5 or less, and an acid value of from 6 mgKOH/g to 12 mgKOH/g, wherein the binder resin is a polyester resin, wherein the releasing agent is a monoester wax.

Toner, image forming method, and process cartridge

A toner includes a binder resin; and a plate-shaped pigment having a silica coated layer on the surface, an average-particle diameter of from 10 &#x3bc;m to 25 &#x3bc;m, and an aspect ratio of from 20 to 125.

Toner, toner housing unit, image forming apparatus, and image forming method

A white toner has a first temperature range not less than 25&#xb0; C. in which 60&#xb0; glossiness is 10 or less between a fixable minimum temperature and a fixable maximum temperature thereof. The white toner has a second temperature range not less than 25&#xb0; C. in which 60&#xb0; glossiness is from 30 to 60 therebetween.

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Shizuoka, Japan

Yu Naito