Toner, Developing Device and Developing Method Using the Same

A toner container containing toner and adapted to be used with the developing device to develop an electrostatic latent image formed on an image carrier, the toner comprising:

• a toner mother particle;
• a first external additive comprising a first inorganic fine particle having a primary particle size distribution of 200 to 750 nm and a work function approximately equivalent to that of the toner mother particle;
• a second external additive comprising a second inorganic fine particle having an mean particle size smaller than that of the first inorganic fine particle and a work function smaller than those of the toner particle and an inner wall of the container;
• and
• 0.01% to 0.3% by weight of a metal soap having a work function approximately equivalent to that of the toner mother particle.