Plate-making method and plate-making apparatus

摘要

A plate-making method comprising: forming an image directly on a plate material by an ink jet process of ejecting an oil ink using an electrostatic field based on signals of image data; and fixing the image to prepare a printing plate, wherein prevention of coagulation and/or precipitation of the oil ink particles is performed at least in a circulation of the oil ink, and an on-press drawing lithographic printing method comprising: attaching a plate material onto a plate cylinder of a press; forming an image directly on the plate material by an ink jet process of ejecting an oil ink from a recording head using an electrostatic field based on signals of image data to prepare a printing plate; and performing lithographic printing using the printing plate in that state, wherein prevention of coagulation and/or precipitation of the oil ink particles is performed at least in a circulation of the oil ink.