| 摘要 |
PURPOSE:To perform 2nd development without disordering a 1st toner image by charging a 1st developer electrostatically with a larger electrostatic charging quantity than a 2nd developer and forming a 1st toner image. CONSTITUTION:This dichroic electrophotographing method repeats exposure and development in order on an electrostatically charged photosensitive body by using developers of two colors to form toner image of the two colors, which are transferred together to a transfer medium and fixed. This dichroic electrophotographing method charges the 1st developer electrostatically with the larger electrostatic charging quantity than the 2nd developer to form the 1st toner image. Thus, the 1st developer which is imparted a larger electrostatic charging quantity sticks strongly on the photosensitive body, so the 1st toner image formed with it is seldom disordered even in the 2nd development. The difference in electrostatic charging quantity between the 1st and 2nd developers is preferably >=3 muc/g in absolute value and the absolute value of the electrostatic charging quantity of the 1st developer is adjusted preferably within a 10-30 muc/g range. |
