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    • 2. 发明公开
    • On press development of a diazo based printing plate
    • Druckpressentwicklung von lithographischen Diazodruckplatten
    • EP0768172A1
    • 1997-04-16
    • EP95202739.9
    • 1995-10-11
    • AGFA-GEVAERT naamloze vennootschap
    • Vermeersch, JoanKokkelenberg, DirkVan Hunsel, JohanHauquier, Guido
    • B41C1/10G03F7/016
    • G03F7/016
    • According to the present invention there is provided a method for making a lithographic printing plate comprising the steps of:

      (1) image-wise exposing an imaging element having on a support in the order given (i) a uniform ink-repellant layer comprising a hydrophilic binder cross-linked by means of a hydrolysed tetra-alkylorthosilicate and (ii) a photosensitive layer comprising a diazonium salt or a diazo resin;
      (2) and developing a thus obtained image-wise exposed imaging element by mounting it on a print cylinder of a printing press and supplying an aqueous dampening liquid and/or ink to said photosensitive layer.

      The present invention also provides a method for making multiple copies of an original comprising the steps of:

      (1) image-wise exposing an imaging element having on a support in the order given (i) a uniform ink-repellant layer comprising a hydrophilic binder cross-linked by means of a hydrolysed tetra-alkylorthosilicate and (ii) a photosensitive layer comprising a diazonium salt or a diazo resin;
      (2) mounting a thus obtained image-wise exposed imaging element without development, on a print cylinder of a printing press;
      (3) rotating said print cylinder while supplying an aqueous dampening liquid and/or supplying ink to said photosensitive layer of said imaging element and
      (4) transfering ink from said imaging element to a receiving element.
    • 根据本发明,提供了一种制备平版印刷版的方法,包括以下步骤:(1)以下列顺序成像曝光具有在支持体上的成像元件:(i)均匀的墨水排斥层,包括 通过水解的四烷基原硅酸酯交联的亲水性粘合剂和(ii)包含重氮盐或重氮树脂的感光层; (2),并通过将这样获得的图像曝光的成像元件安装在印刷机的印刷滚筒上并将水性润版液体和/或墨水供应到所述感光层来显影。 本发明还提供了一种用于制作原件的多个副本的方法,包括以下步骤:(1)以给定的顺序成像地曝光具有在支撑体上的成像元件(i)包含亲水性粘结剂的均匀墨水排斥层 通过水解的四烷基原硅酸酯交联,和(ii)包含重氮盐或重氮树脂的感光层; (2)将没有显影的如此获得的图像曝光成像元件安装在印刷机的印刷滚筒上; (3)在提供水性润版液体和/或向所述成像元件的所述感光层供应墨水的同时旋转所述印刷滚筒,和(4)将油墨从所述成像元件传送到接收元件。
    • 4. 发明公开
    • A diazo based imaging element having improved storage stability
    • Diazo-Aufzeichnungselement mit verbesserterLagerstabilität
    • EP0737894A2
    • 1996-10-16
    • EP96200144.2
    • 1996-01-22
    • AGFA-GEVAERT naamloze vennootschap
    • Vermeersch, JoanKokkelenberg, DirkHauquier, Guido
    • G03F7/016
    • G03F7/016
    • The present invention provides an imaging element comprising on a support a hydrophilic layer containing a hydrophilic (co)polymer or (co)polymer mixture and having been hardened with a hydrolysed tetraalkyl orthosilicate and a light sensitive layer containing a diazo resin and/or a diazonium salt characterized in that the light sensitive layer comprises at least one diazo resin or diazonium salt containing or being a diazonium salt of p-aminodiphenylamine containing as substituent an alkyl or alkoxy group and the weight percentage of said diazonium salt(s) and/or diazo resin(s) containing or being a diazonium salt of p-aminodiphenylamine containing as substituent an alkyl or alkoxy group versus the total amount of diazo resin and/or diazonium salt ranges from 22 to 40%.
    • 本发明提供了一种成像元件,其在载体上包含亲水层,该亲水层含有亲水(共)聚合物或(共)聚合物混合物,并且已被水解的原硅酸四烷基酯和含有重氮树脂和/或重氮的光敏层硬化 盐,其特征在于,感光层包含至少一种含有或作为含有烷基或烷氧基取代基的对氨基二苯胺的重氮盐的重氮树脂或重氮盐,并且所述重氮盐和/或重氮的重量百分数 含有或作为烷基或烷氧基取代基的对氨基二苯胺的重氮盐相对于重氮树脂和/或重氮盐的总重量的树脂的含量为22〜40%。