An image formation apparatus develops an electrostatic latent image with a two-component
developer consisting of magnetic carriers and toners by using a development apparatus
and a latent image supporter including a filler in an outermost layer thereof,
the development apparatus having a developer supporter, which has an internally
fixed magnetic body and rotates while supporting a developer on a surface thereof,
and a developer quantity controller controlling a quantity of the developer which
is supported by the developer supporter facing the magnetic body and controlling
a height of magnetic brushes and consisting of materials having rigidity or rigidity
and magnetic properties, wherein a ratio (Gp/Gd) of a development gap to a doctor
gap between the developer supporter and the controller is from 0.7 to 1.0, and
a weight-averaged particle diameter of a developer carrier is from 20 to 60 m.
