| 摘要 |
PURPOSE:To make a color tone in a proper value by performing a comparison operation of densities of a solid part, a halftone dot part and a desired value, and controlling supplying quantities of an ion supply device and a damping water supply device by a controller. CONSTITUTION:A density of a proper solid part 2 of a printing matter 1 and a desired density of a halftone dot part 6 are inputted in a controller 4. The density of the solid part 2 and the density of the halftone dot part 6 measured by a line type image camera 7 are compared with a desired density 31 fetched from an image memory 12 so as to obtain a deviation value. The controller 4 sends signals to an ink supply device 5 and a damping water supply device 14 until the deviation value becomes zero. Thus, the ink supply quantity and damping water supply quantity are kept properly. |
