| 摘要 |
PURPOSE:To provide the processing method for a direct planographic printing plate utilizing a silver complex salt diffusion transfer method which can ameliorate the drop-out of transferred silver images and remarkably improve plate wear and obviates the degradation in ink accepting capacity. CONSTITUTION:This direct planographic printing plate and developer contain the compd. expressed by formula I. In the formula, R denotes 4 to 9C alkyl group; X denotes an oxygen atom or sulfur atom; Z is a bivalent combination group and denotes bivalent oxygen, bivalent sulfur, amide; (n) is 0 or 1. |
