| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus that suppresses the occurrence of background stain on a surface of an image carrier even when the image forming apparatus is left unused for a long time in a high-humidity environment and stabilizes image density.SOLUTION: After an image forming operation is started, when the density of toner detected by a magnetic sensor 13m (toner density detection means) while the density of toner is controlled to be adjusted becomes higher than a predetermined target value X0 by a predetermined threshold α or more, an image forming apparatus suspends the image forming operation and forms toner images for detection WY, WM, WC, and WBK on a surface of an intermediate transfer belt 17 (intermediate transfer body) to re-adjust a development potential so that the image density of the toner images for detection WY, WM, WC, and WBK detected by an image density detection sensor 50 (image density detection means) becomes a predetermined value Y.SELECTED DRAWING: Figure 6 |
