摘要 |
A toner that realizes high toner fill in toner images, being capable of producing highly fine images through reduction of image layer thickness, and that exhibits stable cleanability over a prolonged period of time; a developing agent utilizing the toner and capable of realizing high image quality; and utilizing the toner, a container packed with toner, process cartridge, image forming apparatus and method of image forming. There is provided a toner of approximately spherical configuration having a rugged surface, comprising a toner material containing at least a binder resin and a colorant, wherein the toner has a shape factor (SF-1), representing the degree of spherical configuration thereof, of 105 to 180 and there is a correlation between shape factor (SF-2) representing the degree of ruggedness of the toner and volume-average particle diameter of the toner, and wherein an inorganic oxide particle-containing layer lies within 1 mum from the surface of the toner. |
申请人 |
RICOH COMPANY, LTD.;KOTSUGAI, AKIHIRO;MOCHIZUKI, SATOSHI;NAKAJIMA, HISASHI;ASAHINA, YASUO;UCHINOKURA, OSAMU;ISHII, MASAYUKI;ICHIKAWA, TOMOYUKI;NAKAYAMA, SHINYA;SAKATA, KOICHI;UTSUMI, TOMOKO;IWATSUKI, HITOSHI;IWAMOTO, YASUAKI;SUGIURA, HIDEKI;TOMITA, MASAMI |
发明人 |
KOTSUGAI, AKIHIRO;MOCHIZUKI, SATOSHI;NAKAJIMA, HISASHI;ASAHINA, YASUO;UCHINOKURA, OSAMU;ISHII, MASAYUKI;ICHIKAWA, TOMOYUKI;NAKAYAMA, SHINYA;SAKATA, KOICHI;UTSUMI, TOMOKO;IWATSUKI, HITOSHI;IWAMOTO, YASUAKI;SUGIURA, HIDEKI;TOMITA, MASAMI |