Patent ID: 8974998
Filing Date: 2015-03-10
Classification: G03G

Abstract:
1. A method, comprising electrostatically charging an electrophotographic photoreceptor with a contact type charging device, exposing the electrostatically charged electrophotographic photoreceptor to form a latent image, developing the latent image with a toner, and transferring the developed image to a recording paper, wherein a photosensitive layer in the electrophotographic photoreceptor comprises an undercoat layer, a charge generation layer, and a charge transport layer, wherein the undercoat layer comprises metal oxide particles and the charge generation layer comprises hydroxygallium phthalocyanine having strong peaks at Bragg angles 2θ±0.2° of 7.4° and 28.2° in CuKα characteristic X-ray diffraction; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 μm to 7.0 μm; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 μm to 3.56 μm satisfies where Dv50 is the volume median diameter (μm) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 μm to 3.56 μm.