| abstract |
(57) [Summary] [PROBLEMS] To reproduce a photosensitive lithographic printing plate from a lithographic printing plate after printing, in order to remove an image, it is possible to easily and reliably remove an image portion, and to use a printing ink at the time of reproduction. Provided is a method for regenerating a lithographic printing plate that can further reduce stains. A method of reproducing a lithographic printing plate uses a photosensitive lithographic printing plate formed by forming a photosensitive layer on a surface of an aluminum support and fixed on a plate cylinder of a printing press, and sensitized by a laser light source. The exposing layer is exposed by scanning, developed and exposed to an image to form a lithographic printing plate, printing ink is supplied to the printing substrate, and then the image is removed with a release agent to remove aluminum. After the body is regenerated, a photosensitive layer is again formed on the surface of the aluminum support to regenerate the photosensitive lithographic printing plate. The above alkaline aqueous solution is used. |