A method for the preparation of a planographic printing plate wherein a photoexposed and developed photographic material containing a pattern of poorly water-soluble silver salt is treated with an aqueous liquid which contains in dissolved state an organic cationic compound or mixture of organic cationic compounds, iodide ions, and a sufficient amount of hydronium ions (H.sub.3 O.sup.+) for creating an acidic medium, said liquid being capable of making an unexposed and undeveloped photographic silver halide material as defined in the disclosure sufficiently receptive for a lithographic ink.
一种制备平版印刷版的方法,其中将经过光曝和显影的含有不易
水溶性
银盐图案的照相材料处理于一种
水溶液中,该
水溶液中溶解了有机阳离子化合物或有机阳离子化合物混合物、
碘离子和足够数量的氢氧根离子(H.sub.3 O.sup.+)以创建酸性介质,该液体能够使未曝光和未显影的照相
银卤化物材料在披上石印油墨时具有足够的接受性。