Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Toner and image forming apparatus using the toner
A toner composition including toner particles including mother toner particles, which include a binder resin, a colorant and a release agent, and a charge controlling agent which is located on a surface of the mother toner particles and fixed thereon, wherein the toner particles have a spherical degree of from 0.960 to 1.000 and a specific surface area of from 0.70 to 2.5 m2/g. The toner composition optionally includes an external additive which is present on the surface of the toner particles.
Ricoh Company Limited
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Shigeru Hiroshi Naohiro Tsunemi Masami Hiroshi
Emoto Yamashita Watanabe Sugiyama Tomita Yamada