| abstract |
A toner comprising a binder resin and a coloring agent, with an aggregation degree of 5 to 60%, and an absolute value of Q/M measured by the suction method of 2 to 30 mu C/g for use in (1) an image formation method in which electric charges are selectively held on the surface of a development roller to form a number of closed micro fields near the surface of the development roller, a non-magnetic one-component type developer comprising toner, with addition of an auxiliary agent thereto when necessary, is supplied onto the development roller, the developer is held on the surface of the development roller by the micro fields, and latent electrostatic images are developed to visible toner images, and (2) an image formation method in which the surface of a developer-bearing member having a chargeable and photoconductive surface is charged, the charged surface is selectively exposed to light for form a number of micro fields near the developer-bearing member, a non-magnetic one-component type developer comprising toner, to which auxiliary agents may be added when necessary, is supplied onto the development roller, the developer is held on the surface of the development roller by the micro fields, and latent electrostatic images are developed to visible images by the developer. |