| 摘要 |
Correction values (”¸1 - ”¸n) according to image area ratios in ranges of a printing plate of a preceding print job corresponding to ink fountain keys (4-1 - 4-n) are obtained. Opening amounts (¸1b - ¸nb) of the ink fountain keys (4-1 - 4-n) corresponding to the image of the printing plate (7') of a next print job are corrected by correction values (”¸1 - ”¸n) to obtain corrected opening amounts (¸1b' - ¸nb'). In a state in which ink in an ink roller group (6) has been decreased by scraping and removing it by an ink scraper blade (15) and in a state in which the opening amounts of the ink fountain keys (4-1 - 4-n) have been set to the corrected opening amounts (¸1b' - ¸nb'), an ink film thickness distribution corresponding to the image of the printing plate of the next print job is formed on the ink roller group (6). |
