METHOD FOR DEVELOPING NEGATIVE AND POSITIVE DAMPING WATERLESS PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLATE WITH SAME DEVELOPER

摘要

PURPOSE: To obtain a method excellent in workability capable of developing different kinds of printing plates with a same water-base developer. ;CONSTITUTION: Each of a negative damping waterless photosensitive planographic printing plate having a photo-peeling photosensitive layer on a substrate, and a positive damping waterless photosensitive planographic printing plate having a photosetting photosensitive layer on a substrate is developed with a water-base developer of pH≥10 containing ≥ 70wt.% water. This developer contains 0.05-20wt.% alkali agent such as sodium silicate and potassium hydroxide to maintain pH≥10.;COPYRIGHT: (C)1994,JPO&Japio