| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkali developing solution for a planographic printing plate which suppresses generation of insoluble matter due to a binder resin and an IR absorbent and deposition on a plate surface while retaining the liquid conditions of the alkali developing solution and enables long-term stable development and to provide a method for making a planographic printing plate. SOLUTION: The alkali developing solution for an IR sensitive planographic printing plate contains a soy polysaccharide. In the method for making a planographic printing plate, an IR sensitive planographic printing plate having an image forming layer containing an IR absorbent is exposed with IR and developed with the alkali developing solution. |
