| 摘要 |
PURPOSE:To always stably form gradation images with high density reproducibility. CONSTITUTION:In the state of setting a charge condition, exposure condition, develop condition and transfer condition to a photosensitive drum 1K or the like, an image forming means transfers a density patch to a transfer belt 6a based on a density pattern generated by a controller 15. When a photodetector 12a detects the density level state of the density patch, corresponding to that density level state, the controller 15 corrects and controls gradation characteristics set to the photosensitive drum 1K or the like. |
