2020 Volume 83 Issue 1 Pages 56-64
Photography based on photoreduction and printing based on photocuring had developed while interacting with each other, and had established the graphic arts field. In printing, typographical information and photographic images were integrated by an optical halftone dot forming technique. It became a standard method by using a contact screen and a lithographic film for plate making. Furthermore, pre-sensitized PS printing plates of industrial products had made a full-scale transition from graphic-arts to graphic-systems. Digitization in the field of plate making has progressed by reading images with a scanner and outputting digital halftone dots after Desk Top Publishing DTP editing. After about 30 years of the advent of the scanner, filmless has been achieved by a plate setter that draws directly on the Computer To Plate CTP with laser beam.
