| 摘要 |
PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing plate having excellent operability and no dirt of a picture frame by a simple method and a printing plate capable of preventing a conduction fault when conducting an electric signal when conveying a printing plate or folding a gripper of the plate by bringing a positioning pin into contact with an end face of the plate and operating. SOLUTION: In the photosensitive lithographic printing plate grained at a cut surface after the plate is cut in a predetermined size by a slitter having at least one set of a pair of cutting blades, the cut surface is grained in a roughness same as a surface of a support, a centerline mean roughness (Ra) of the cut surface is 0.2 to 0.7 μm, the maximum height (Rmax) is 12 μm or below. After the surface to be cut is cut, the surfaces are immediately grained one by one or after the many laminated surfaces are cut, the cut surfaces are grained. |
