DEVELOPING METHOD OF ELECTROSTATIC LATENT IMAGE

摘要

PURPOSE:To develop satisfactorily an electrostatic charge image without fogging by using a conductive magnetic toner which consists of toner particle added with pulverous insulating particles having a specific value of average particle size at a specific ratio to develop the electrostatic charge image with a voltage in a 100-150V range. CONSTITUTION:The specific conductive magnetic toner is used as a developer. Such toner is held on a developer support and is carried into a developing space. The developing voltage to be acted on the developing space is maintained within the 100-150V range. The above-mentioned toner is stuck to the electrostatic charge image on the electrostatic charge image carrier body fed into said developing space to form the toner image, by which the electrostatic charge image is developed. The developer is the conductive magnetic toner formed by adding and mixing the pulverous insulating particles having 7-40mum average particle size to and with the toner powder prepd. by incorporating a magnetic material and other necessary toner components into a binder, at 0.05-2wt% ratio by the weight of the toner particle. The conductivity of the toner is preferably 10<-8>-10<-4>(OMEGAcm)<-1>.