| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device causing no nonuniformity in images by reducing the developer concentration of developer images on an image carrier while carrying the developer images of plural colors in order on the image carrier. SOLUTION: A controller 82 is attained by adjusting the developer concentration of toner images corresponding to respective patch patterns on an intermediate transfer drum 51 according to the intermediate detecting concentration of the detecting concentration of respective patch patterns of a concentration sensor 81 until the other patch patterns are carried on the intermediate transfer drum 51 after respective patch patterns are carried on the intermediate transfer drum 51 and the detecting concentration of the respective patch patterns of the concentration sensor 81 when patch patterns of the whole colors are carried on the intermediate transfer drum 51. |
