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    • 32. 发明公开
    • Lithographic printing plate and process
    • Lithographische Druckplatte und Verfahren。
    • EP0023722A2
    • 1981-02-11
    • EP80104601.2
    • 1980-08-05
    • Fromson, Howard A.
    • Gracia, Robert F.Fromson, Howard A.
    • G03F7/08
    • B41N3/038G03F7/016G03F7/38
    • Lithographic printing plate having

      (a) a substrate with a hydrophilic, anionic, negatively charged surface;
      (b) a layer on said surface of a light sensitive, cationic, positively charged diazonium material which:

      (i) when selectively and incompletely exposed to actinic light becomes adhered to the substrate in the exposed areas; and
      (ii) couples in situ after exposure when treated with an anionic material in a reaction medium to form a reaction product which is insoluble in the reaction medium in the exposed areas but soluble in the unexposed areas thereby simultaneously reinforcing the diazonium material in the exposed areas and removing coupled diazonium material from the unexposed areas.
    • 平版印刷版具有(a)具有亲水,阴离子,带负电荷的表面的基底; (b)在光敏阳离子带正电的重氮材料的表面上的层,其:(i)当选择性地和不完全地暴露于光化的光时,在暴露的区域中粘附到基底上; 和(ii)在反应介质中用阴离子材料处理暴露后原位偶联以形成反应产物,其在暴露区域中不溶于反应介质,但可溶于未暴露的区域,从而同时加强暴露的重氮材料 区域并从未曝光区域除去偶联的重氮材料。