ELECTROPHOTOGRAPHIC CARRIER, DEVELOPER USING THE SAME, AND DEVELOPING METHOD

摘要

PURPOSE: An electrophotographic carrier, a developer using the same, and a developing method are provided to charge the toner in the developer very rapidly to a target electrostatic charge and at the same time, to maintain the target electrostatic charge during printing, to eliminate the chemical fogging related to the slow charging rate, and to perverse the image density related to the maintenance of the electrostatic charge during printing. CONSTITUTION: The charging rate and the charge maintenance of the electrophotographic carrier is preserved if the carrier composed of magnetic core particles and the resin coat satisfies the following equation (B) > A(-19.4) x (A) +31U, wherein (A) represents a carbon content (weight %) of the carrier and (B) represents a ratio of the square root of the number of emitted photoelectrons ((CPS)<1/2>) and the photon energy (eV).