| 摘要 |
PURPOSE:To form optimum dampening-water film thickness onto a printing plate surface, and to execute clear metallic lithographic printing by optimally following and driving Dahlgren damping system or an Epick dampener device in conformity with the quantity of fluctuation of a fluctuation factor during the normal operation of a lithographic press. CONSTITUTION:Fluctuation factors of every kind of the quantity of dampening water adhering on the printing plate surface 21a of a plate cylinder 21 in lithographic printing are measured in succession during the operation of the lithographic press B, or reference value is set previously and optimum control command value is calculated at a real time through centralized input to a microcomputer 14, and the Dahlgren motor 19a or Epick dampener motor 19b are controlled in succession. Optimum dampening-water film thickness can be formed onto the printing plate surface 21a and controlled at all times, and clear metallic lithographic printing having excellent quality can be executed. |
