| 摘要 |
PURPOSE:To obtain a processing soln. contg. a diffusion transfer accelerator and excellent in plate wear in a developer for the direct lithographic printing plate utilizing a silver complex salt diffusion transfer process. CONSTITUTION:This novel diffusion transfer accelerator is shown by the formula. In the formula, R is alkyls (e.g. ethylene, propylene and tetramethylene), Z is an atomic group (e.g. thiazoline ring, pentiazoline ring, etc.), X is sulfur atom, and (n) is 1 to 4. The direct lithographic printing plate prepared by this developer is improved in the omission of the transfer silver image, the printing resistance is remarkably ameliorated, and the ink receivability is not deteriorated. |
