| 摘要 |
PURPOSE:To provide high sensitivity, high resolving power and high print resisting power to a titled plate by incorporating a specific sensitizing dye and specific compd. into an emulsion layer. CONSTITUTION:At least one of the sensitizing dye expressed by the formula [I] and at least one of the compd. expressed by the formulas [II]-[III] are incorporated into the emulsion layer. In the formulas, A denotes a bivalent arom. residual group, Z1, Z2 and Z3 respectively denote the atomic groups necessary for forming a 5- or 6-membered nitrogenous heterocycle, R1, R2 and R10 respectively denote alkyl groups, alkenyl groups, R3 denotes an alkyl group, alkenyl group, aryl group, R4-R9, R12-R15 respectively denote hydrogen atoms, halogen atoms, alkyl groups, aryl groups, alkoxy groups, R11 denotes a hydrogen atom, alkyl group, aryl group. The lithographic printing plate which has the high sensitivity to semiconductor laser light and high print resisting power and minimizes the deterioration of said characteristics after preservation is thus obtd. |
