ELECTROSTATIC CHARGE IMAGE DEVELOPING CARRIER, ITS PRODUCTION, AND IMAGE FORMING METHOD

摘要

PURPOSE:To provide an electrostatic charge image developing carrier, its production method, and image forming method so that deposition of the carrier on an image can be prevented, excellent image qualities can be obtd. without irregular density or staining, and the consumed amt. of the carrier can be suppressed. CONSTITUTION:This electrostatic charge image developing carrier consists of magnetic core particles having 2.0-7.0 of surface index h defined by the following formula, and the core particle is coated with a resin. This carrier is produced by applying the resin by dry mixing and melting method. Further, an image is formed by using this carrier. h = A/[SIGMA0.03X[Wi/(rhoXr)]], wherein A is BET specific surface area (cm<2>/g), Wi represents wt.% for i-th class of particle size, rhor is the true density of the magnetic core particle (g/cm<3>) and r is the radius of particle for each class of particle size (cm).