| 摘要 |
PROBLEM TO BE SOLVED: To provide a color image forming device without causing any change in image quality even when it is used for a long term and installed with a toner recycling mechanism. SOLUTION: This image forming device is provided with an image forming part YG yellow toner as the 1st image forming part G1, an image forming part MG using magenta toner as the 2nd image forming part G2, an image forming part CG using cyan toner as the 3rd image forming part G3 and an image forming part BG using black toner as the 4th image forming part G4 being a final stage respectively. Then, untransfer toner Tr eliminated from the respective photoreceptors of the image forming parts G1, G2, G3 and G4 is recovered to the developing unit D4 of the image forming part G4 and the recovered toner is reused for forming an image together with unuse black toner supplied to the developing unit D4. Thus, the control accuracy of toner concentration at each monochromatic image forming part is enhanced. |
