abstract |
(57) [Summary] [PROBLEMS] To provide a lithographic printing method capable of coping with digital image data and printing a large number of inexpensive, high-speed, clear images on a printed sheet. SOLUTION: An image is directly formed on a plate material mounted on a plate cylinder of a printing press by an ink jet method in which an oil-based ink is ejected from a head using an electrostatic field based on a signal of image data, and a printing plate is created. A lithographic printing method and a lithographic printing apparatus, wherein the printing press has digital control means. |