Patent ID: 6416919
Filing Date: 2002-07-09
Classification: G03G

Abstract:
An image-forming method comprising the steps of forming a latent image on a latent image substrate, which is uniformly charged, based on image data, and developing the latent image by a developer held on a developer carrying member provided with a bias potential for development, wherein the developer comprises a magnetic carrier, which comprises a core and a resin coating layer formed thereon containing an electroconductive powder such that, when the magnetic brush is formed only of the core, the dynamic electrical resistance of the core forming the magnetic brush is 1 &OHgr;Â·cm or less under an electric field of 104V/cm, and when the magnetic brush is formed only of the magnetic carrier, the electrical resistance of the magnetic carrier forming the magnetic brush is from 10 to 1Ã—109 &OHgr;Â·cm under an electric field of 104V/cm, and toner, wherein the developer has a saturated region in the developing curve defined by a contrast potential, which is determined by bias potential for development and the potential at the exposed part on the latent image substrate, and the amount of developer toner moving to the latent image on the latent image substrate, and wherein bias potential is applied to the developer carrying member so that the amount of developer toner exhibits the saturation characteristic and wherein the toner comprises a binder and a colorant.