Mita Industrial Co., Ltd.

Takafumi Nagai

Akihiro Watanabe

Masahiko Kubo

Hironori Maruyama

Black toner for electrophotography used for visualizing an electrostatic latent image formed on an image-holding body is provided which includes a resin binder and carbon black dispersed in the resin binder. The carbon black has a volatile component content of 4% or more, a structure index of 100 or more, and a mean grain size in the range of 20 to 35 nm.

Black toner for electrophotography

The present invention provides a developing method which comprises transferring a two-component developer comprising a magnetic carrier and a toner from a sleeve to a development area and developing a latent electrostatic image on a latent electrostatic image-carrier in the development area, wherein the development conditions in the development area are prescribed so as to satisfy the formulae (1) and (2):

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Higashiosaka, Japan

Takafumi Nagai