Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Toner composition and method for manufacturing the toner composition
A toner composition including toner particles including a binder resin; and a colorant, and a charge controlling agent which is at least located on a surface of the toner particles, wherein the toner composition has a spherical degree of from 0.96 to 0.99, and wherein the toner composition satisfies the relationship: 10≦M/T≦1,000 wherein M represents a quantity of an element on a surface of the toner particles in units of % by weight, wherein the element is included only in the charge controlling agent, and is one of elements of second to fifth periodical elements in the long form periodic table other than hydrogen, carbon, oxygen and rare gas elements; and T represents a quantity of the element in the toner composition in units of % by weight.
Ricoh Company Limited
G G B G G
G03G G03G B01F G03G G03G
inventional inventional additional inventional inventional
Hiroshi Masami Tsunemi Chiaki Kazuhito Shigeru
Yamashita Tomita Sugiyama Tanaka Watanabe Emoto