PLATE-MAKING SYSTEM OF PLANOGRAPHIC PRINTING PLATES FOR ON-PRESS DEVELOPMENT, PLANOGRAPHIC PRINTING PLATE FOR ON-PRESS DEVELOPMENT, AND PRINTING METHOD

摘要

To provide a plate-making system of planographic printing plates for on-press development that prevents edge soiling without reducing productivity of planographic printing plates for on-press development.SOLUTION: A plate-making system 101 of planographic printing plates for on-press development comprises: an exposing unit 2 which imagewise exposes a planographic printing plate precursor; a printing unit 107 which prints plate information on the planographic printing plate precursor; and a coating unit which includes coating means for coating a region within 1 cm from an end portion of at least one side of the planographic printing plate precursor with processing liquid that contains a hydrophilizing agent. The plate information is printed using aqueous ink.SELECTED DRAWING: Figure 4