| abstract |
[57] [Abstract] [Problem] To be able to print a large number of inexpensive, high-speed, clear images that can correspond to digital image data, and to fix enough to obtain sufficient printing durability with high quality images. Provided is an on-press lithographic printing method capable of obtaining various heating conditions by heating for a short time. SOLUTION: A plate material is mounted on a plate cylinder of a printing press, and an image is directly formed on the plate material by an ink jet method including a recording head for discharging oil-based ink based on a signal of image data, and then heat fixing is performed. In the on-press drawing lithographic printing method in which a printing plate is prepared by performing the printing process and the lithographic printing is continuously performed using the plate material in this state, the heating and fixing are firstly pre-heated, and thereafter, performed by a heat roller. I did it. |