To miniaturize a device by a method wherein a color printing is executed on a predetermined recording medium so as to carry out a color adjustment on the basis of its printing result in order to produce press plates for respective colors for magenta ink, for cyan ink and for yellow ink.
In order to print a color image by an offset printing machine, first of all, a manuscript is edited on a personal computer 6. The manuscript contains characters, photographs, figures and the like, which are properly arranged so as to complete a printing copy. Next, a printing work is started. As a first step, the copy is sent through a cable 7 to a print head 2 so as to print on a plain paper, since this printed paper is a proof sheet under the condition that an arbitrary recording medium such as a plain paper or the like will do. Next, as a second step, color conditions are carefully checked so as to realize the desired color matching. By carrying out the color adjustment, a final copy is determined. Finally, as a third step, an offset printing is started. A color proof and a press plate can be formed by a single ink jet printer.
NOTO NOBUHIRO
SUEMATSU SHIGENORI
SHOJI YUTAKA
SHIMIZU KAZUO
AKIYAMA YOSHITAKA
SATO TAKASHI
WATANABE KEIJI
