| 摘要 |
A correction amount (Δθ1-Δθn), which accords to a pattern area rate of a printing plate for a prior printing job and is within a range corresponding to an ink fountain key (4-1 to 4-n), is acquired, and an opening amount (θ1b-θnb), which is for the ink fountain key (4-1 to 4-n) and corresponds to a pattern on a printing plate (7') for a subsequent printing job, is corrected by the correction amount (Δθ1-Δθn) to obtain a corrected opening amount (θ1b'-θnb'). In a state such that the ink within an ink roller group (6) is decreased due to removal using an ink scraping plate (15), and the opening amount of the ink fountain key (4-1 to 4-n) is set to the corrected opening amount (θ1b'-θnb'), an ink film thickness dispersion that accords to the pattern of the printing plate for the subsequent printing job is formed in the ink roller group (6). |
