Patent ID: 6737209
Filing Date: 2004-05-18
Classification: G03G

Abstract:
A color image forming method for forming a color toner image, comprising the steps of:forming toner images of three color toners of yellow, magenta, and cyan and a black toner; and superposing the toner images, thereby forming the color toner image, wherein each of said color toners is a flattened toner composed of particles each having an equivalent circle diameter d of 5 to 10 (&mgr;m) when viewed from a direction to make a projection area maximum, a thickness t of 1 to 4 (&mgr;m), and a flattening ratio d/t of 2 to 8 represented by a ratio of said equivalent circle diameter d to said thickness t, and wherein the flattening ratio d/t of the particles of each of said three color toners is larger than a flattening ratio dk/tk of the particles of said black toner, where dk and tk represent an equivalent circle diameter and a thickness, respectively, of the particles of said black toner.