Ricoh Company, Ltd.

Shohta Kobayashi

Yoshitaka Sekiguchi

Masayuki Ishii

Satoshi Ogawa

Taichi Nemoto

Susumu Chiba

Yoko Arai

Naoko Kitada

Kaori Miyahara

Yoshihito Shimada

Provided is a toner including a binder resin, a release agent, and a charge-controlling agent, wherein the toner includes toner particles having particle diameters of 3 micrometers or smaller, among the toner particles having particle diameters of 3 micrometers or smaller, a proportion of the toner particles having an average circularity of 0.70 or greater but 0.85 or less in all of the toner particles is 10% by number or greater but less than 20% by number and a proportion of the toner particles having an average circularity of less than 0.70 in all of the toner particles is 10% by number or less.

Toner, image forming method, image forming apparatus, and process cartridge

Provided is a toner including a binder resin, and a charge-controlling agent, wherein a volume average particle diameter X of the toner after a stress treatment satisfies Formula (1), and an amount Y of fine toner particles having particle diameters of 3 micrometers or smaller and circularity of 0.70 or less satisfies Formula (2).

Toner, production method of toner, image forming method, image forming apparatus, and process cartridge

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Shizuoka, Japan

Shohta Kobayashi