Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Masahiro Oki

Akira Imai

Takako Kobayashi

Koji Horiba

Daisuke Yoshino

Yoshihiro Inaba

Hiroyuki Moriya

Tetsuya Taguchi

Kenji Yao

Hideaki Yoshikawa

Kazusei Yoshida

Takahiro Ishizuka

Hirokazu Hamano

Yuko Iwadate

Ayu Naito

Takeshi Iwanaga

Ryosaku Igarashi

Satomi Kashiwagi

Yoshitake Ogura

Shota Matoba

A cellulosic particle contains cellulose as its base constituent, and the intensity of sodium fluorescent x-rays from the cellulosic particle measured by x-ray fluorescence analysis is 0.015 kps or more and 0.1 kps or less.

Cellulosic particle

A cellulosic particle contains cellulose as its base constituent, and the percentage water absorption of the cellulosic particle measured by method B in ISO 15512:1999 is 11% or more and 20% or less.

A cellulosic particle contains 90 parts by mass or more and 99.5 parts by mass or less of cellulose; and 0.5 parts by mass or more and 10 parts by mass or less of a cellulose derivative.

A cellulosic particle includes: a cellulose-based core particle; a first coating layer covering the core particle and containing a polyamine compound; and a second coating layer covering the first coating layer and containing at least one selected from the group consisting of a wax, a linear-chain saturated fatty acid, a hydroxy fatty acid, and an amino acid compound.

Resin particles include mother particles containing a biodegradable resin, and a coating layer containing at least one selected from the group consisting of a quaternary ammonium salt-containing polymer, polyacrylamide, polyvinylpyrrolidone, and polylysine on a surface of the mother particles.

Resin particles

Resin particles include mother particles containing a biodegradable resin and a plasticizer, in which an amount of a metal element having an ionic valence of 2 or more, obtained by fluorescent X-ray analysis, is 0.002% by mass or more and 2.0% by mass or less with respect to a total amount of the resin particles.

Resin particles comprising a biodegradable resin and a specific amount of a metal element

Resin particles include mother particles containing a biodegradable resin, in which an alkali metal atomic weight A present on a resin particle surface with respect to a total atomic weight present on the resin particle surface, which is measured by an X-ray photoelectron spectroscopy, and an alkali metal atomic weight B present in the resin particles with respect to the total atomic weight present on the resin particles, which is measured by a fluorescent X-ray spectroscopy, satisfy a relationship of 0&#x2264;(A/B)&#x3c;0.15 and 0.005 atomic %&#x2264;B&#x2264;0.5 atomic %.

A liquid developer includes a carrier liquid and a toner including a urethane-modified acrylic resin.

Liquid developer and developer cartridge

A liquid developer includes a carrier liquid and a toner particle whose surface is treated by a polyamine, wherein an amount of sodium ion to be eluted in 1 g of the toner particles is 0.04 mg or less.

Liquid developer, developer cartridge, and image forming apparatus

A liquid developer contains a carrier liquid and a toner particle which contains a binder resin, wherein the toner particles have a content of aluminum measured by fluorescent X-ray analysis in a range of from 0.04% by weight to 0.1% by weight of total elements.

A positively chargeable toner includes at least a binder resin, and toner particles of which surfaces are modified by a polyvinylamine compound.

Positively chargeable toner, liquid developer, developer, developer cartridge, process cartridge, and image forming method

A liquid developer includes a carrier liquid, and a toner particle which contains a resin having an unsaturated double bond, a compound represented by the formula (I) and a photopolymerization initiator and whose surface is treated by a polyamine, wherein m and n each independently represent an integer of 1 to 10,000; m+n represents an integer of 10 to 10,000; and R, R, and Reach independently represent a single bond or a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms.

An electrostatic charge image developing toner includes a toner particle that contains a binder resin and is surface-modified by a polymer obtained by polymerizing a monomer containing dicyandiamide and diethylenetriamine, wherein toner particles have positive charging properties.

Electrostatic charge image developing toner, liquid developer, and toner cartridge

A liquid developer includes a carrier liquid having silicone oil, and toner particles including a polyester resin and having a value of ammonium ions contained therein measured by underwater extraction in a range of 0.005 ppm to 1 ppm.

Liquid developer, particles for liquid developer, and liquid developer accommodation container

An image forming method includes forming an unfixed toner image on a recording medium using a toner that contains a carboxyl group-containing resin having a carboxyl group and an oxazoline group-containing resin having an oxazoline group, fixing the unfixed toner image to the recording medium to form a fixed toner image, and performing a heat treatment on the fixed toner image at a temperature higher than or equal to a fixing temperature.

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Kanagawa, Japan

Masahiro Oki