| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkali developing solution for a photosensitive planographic printing plate capable of forming a high sharpness clear image without generating a residual film on non-image areas or causing defects to image areas when a photosensitive planographic printing plate is developed and capable of exhibiting constant performance even when components of a photosensitive layer dissolve in the solution. SOLUTION: The alkali developing solution for an IR sensitive planographic printing plate contains a nonionic surfactant or an alkylene oxide addition compound and salts of metals selected from the groups 2-15 of the periodic table of the elements. In a 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. |
