Ricoh Company, Ltd.

Junjiroh Sogame

Shinya Nakagawa

Yuuya Takabayashi

Katsuhiko Fujii

Takafumi Sasaki

Shinichiroh Satoh

Hiroyuki Miyata

Kohsuke Miyazaki

Naoki Oya

Takumi Yokoyama

Osamu Mizuta

A carrier for forming an electrophotographic image is provided. The carrier comprises a core particle and a resin layer coating the core particle. The resin layer contains a chargeable particle A, a conductive particle B, a dispersing agent, and a defoaming agent.

Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge

Provided is a powder material for producing a three-dimensional object including: a base material; a resin; and resin particles, wherein an amount W (mass %) of carbon remaining in the powder material after heating in a vacuum of 10Pa or lower at 450 degrees C. for 2 hours satisfies the following formula: W (mass %)&#x3c;0.9/M, where M represents the specific gravity of the base material.

Powder material for producing three-dimensional object, kit for producing three-dimensional object, and three-dimensional object producing method and apparatus

A carrier for forming an electrophotographic image is provided. The carrier comprises carrier particles each comprising a core particle and a coating layer. The coating layer comprises a coating resin and inorganic particles comprising chargeable particles A and conductive particles B. The amount of the inorganic particles is from 195 to 350 parts by mass with respect to 100 parts by mass of the coating resin. The carrier particles consist of small carrier particles (D1&#x2264;25 &#x3bc;m), medium carrier particles (25 &#x3bc;m&#x3c;D2&#x2264;38 &#x3bc;m), and large carrier particles (38 &#x3bc;m&#x3c;D3). A constituent element variation, that is a ratio of an amount of a constituent element of the inorganic particles contained in the coating layer of the small carrier particles to an amount of the same constituent element of the inorganic particles contained in the coating layer of the medium carrier, is from &#x2212;10.0% to 10.0%.

Carrier for forming electrophotographic image, two-component developer, developer for replenishment, image forming apparatus, process cartridge, and image forming method

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Shizuoka, Japan

Junjiroh Sogame