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    • 4. 发明授权
    • Method for making lithographic printing plate
    • 平版印刷版制作方法
    • US4873170A
    • 1989-10-10
    • US082318
    • 1987-08-06
    • Hiroshi NishinoiriMasahiko SaikawaYoshikazu TakayaEuji Kanada
    • Hiroshi NishinoiriMasahiko SaikawaYoshikazu TakayaEuji Kanada
    • G03C8/06G03F7/07
    • G03F7/07G03C8/06Y10S430/145
    • There is provided a method for making a lithographic printing plate having high sensitivity, resolving power and printing endurance and free from scumming utilizing silver complex diffusion transfer process which comprises subjecting to scanning exposure of high-intensity short-time a light sensitive material comprising a support and, provided thereon, at least a silver halide emulsion layer and a physical development nuclei layer as a surface layer and then developing it with a silver complex diffusion transfer developer, the improvement which comprises subjecting the light sensitive material to imagewise exposure with scanning light of at least 700 nm, said emulsion layer containing silver halide grains mainly composed of silver chloride and a sensitizing dye having a sensitivity maximum in the long wavelength region of at least 700 nm in an amount of 3.times.10.sup.-5 -3.times.10.sup.-4 mol for 1 mol of silver halide and an antihalation means being provided below said emulsion layer to provide a reflectance of 13-40% for the scanning exposure light of at least 700 nm.
    • 提供了一种使用具有高灵敏度,分辨能力和耐印刷性并且不含浮渣的平版印刷版的方法,其使用银络合物扩散转移方法,其包括对高强度短时间的感光材料进行扫描曝光,所述光敏材料包括载体 并且在其上提供至少一个作为表面层的卤化银乳剂层和物理显影核层,然后用银络合物扩散转移显影剂显影,其改进包括使光敏材料对扫描光进行成像曝光 至少700nm,所述乳剂层含有主要由氯化银组成的卤化银颗粒和在至少700nm的长波长范围内的灵敏度最大值为1×10-5-3×10-4mol的敏化染料 的卤化银,并且在所述乳剂层下方提供防晕装置以提供反射镜 ce为至少700nm的扫描曝光光,为13-40%。