Fuji Xerox Co., Ltd.

Hiroki Omori

Fusako Kiyono

Yutaka Saito

Yuka Yamagishi

Mona Tasaki

Shintaro Anno

Emi Matsushita

An electrostatic charge image developing toner includes a toner particle, a polishing agent particle, and a fatty acid metal salt particle, wherein a rate of the fatty acid metal salt particles strongly attached to the surface of the toner particles is equal to or greater than 50% by number with respect to the fatty acid metal salt particles attached to the surface of the toner particles.

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

An electrostatic charge image developing toner includes toner particles containing a binder resin and a release agent; and an external additive containing fatty acid metal salt particles, wherein a non-attachment rate representing a percentage of the fatty acid metal salt particles not attached to the toner particles before ultrasonic desorption treatment is 45% or less and a weak attachment rate representing a percentage determined by subtracting the non-attachment rate from a percent of the fatty acid metal salt particles not attached to the toner particles after ultrasonic desorption treatment is 55% or more.

An electrostatic charge image developing toner includes toner particles containing a binder resin and a release agent and an external additive containing fatty acid metal salt particles and abrasive particles, wherein a ratio (B/A) of an isolation amount B of the abrasive particles isolated from the toner particles after an ultrasonic isolation treatment to an isolation amount A of the fatty acid metal salt particles isolated from the toner particles after the ultrasonic isolation treatment is from 0.3 to 2.0.

According to one example of the present application, there is provided a toner for developing an electrostatic charge image, containing: a toner particle containing a binder resin; a particle adhering to a surface of the toner particle; and an elastomer particle containing one or more kinds of oil, wherein a volume particle size distribution index GSD(D50/D16) on a small diameter side of the toner particle and a volume particle size distribution index GSD(D50/D16) on a small diameter side of the elastomer particle satisfy Formula (1):&#x2267;1.&#x2003;&#x2003;Formula (1):

Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

An electrostatic charge image developing toner includes toner particles, polishing agent particles which have a number particle size distribution having two peaks, and fatty acid metal salt particles which have a number particle size distribution having one peak, wherein the toner satisfies relationships expressed by expressions: (1) Da&#x2266;0.5&#xd7;Dt, (2) Dc&#x2266;0.5&#xd7;Dt and (3) Dt&#x2266;Db, wherein Da represents a particle diameter of a small-diameter-side peak in the two peaks of the number particle size distribution of the polishing agent particles, Db represents a particle diameter of a large-diameter-side peak in the two peaks of the number particle size distribution of the polishing agent particles, Dc represents a particle diameter of a peak of the number particle size distribution of the fatty acid metal salt particles, and Dt represents a volume average particle diameter of the toner particles.

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

An electrostatic charge image developing toner includes toner particles, elastomer particles which are externally added to the toner particles and contain a first oil, and inorganic particles which are externally added to the toner particles and contain a second oil having a viscosity higher than a viscosity of the first oil at 25&#xb0; C.

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Kanagawa, Japan

Hiroki Omori