Patent ID: 7032514

Claim:
A planographic printing press, comprising: a mounting section which mounts an original printing plate having photo catalyst power; a processing section which hydrophobically processes the entire surface of said original plate on which a layer of a hydrophobic substance is provided; an activation light irradiation section which irradiates activation light one of on said original printing plate carrying the layer of said hydrophobic substance as per image and on the entire surface thereof; means for heating said original plate during irradiating said activation light so that the temperature of the surface of said original plate becomes 40 through 200° C. one of as per image and on the entire surface thereof, so that a hydrophobic area and a hydrophilic area are formed on said original plate; a section which supplies ink to said hydrophobic area and which supplies a damping solution to said hydrophilic area; and a printing section which prints by bringing a printing surface, on which said hydrophobic area accepts the ink and said hydrophilic area accepts the damping solution, into contact with a surface to be printed.