Ricoh Company, Ltd.

Kei Niwayama

Koichi Sakata

Shinya Nakagawa

Mariko Takii

Haruki Murata

Masashi Nagayama

Saori Yamada

Tohru Suganuma

Yoshihiro Murasawa

Masahiro Seki

Kohsuke Miyazaki

Hiroyuki Kishida

Masato Taikoji

Takahiro Nakamura

Provided is a carrier for a developer of an electrostatic latent image, the carrier including a core particle, and a resin layer covering the core particle, where the resin layer includes metal compound particles, wherein the metal compound particles include magnesium compound particles or barium compound particles, and an exposed amount B (atomic %) of the magnesium or the barium on a surface of the carrier particle satisfies a relationship below:10.0&#x2265;B &#x2265;1.2.

Carrier for developer of electrostatic latent image, two-component developer, replenishing developer, image forming apparatus, and toner stored unit

A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m/g through 1.90 m/g,C&#x2212;F&#x2003;&#x2003;Formula 1where C is a BET specific surface area (m/g) of the carrier and F is a BET specific surface area (m/g) of the core particles.

Carrier for developer of electrostatic latent image, developer, and image forming apparatus

A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.

Carrier and developer

Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 &#x3bc;m from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 &#x3a9;&#xb7;cm or less.

Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge

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Shizuoka, Japan

Kei Niwayama