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    • 2. 发明公开
    • Method for making a lithographic printing plate
    • 制造平版印刷版的方法
    • EP0620673A1
    • 1994-10-19
    • EP93201114.1
    • 1993-04-16
    • AGFA-GEVAERT naamloze vennootschap
    • Delabastita, PaulVan Hunsel, Johan
    • H04N1/40G03F7/07
    • H04N1/4052G03F7/07
    • There is provided a method for making a lithographic printing plate from an original containing continuous tones comprising the steps of:

      screening said original to obtain screened data
      image-wise exposing a lithographic printing plate precursor according to said screened data, said lithographic printing plate precursor having a flexible support carrying a surface capable of being differentiated in ink accepting and ink repellant areas upon said image-wise exposure and an optional development step and
      optionally developing a thus obtained image-wise exposed lithographic printing plate precursor, characterized in that said screening is a frequency modulation screening.
    • 提供了一种由包含连续色调的原件制造平版印刷版的方法,包括以下步骤:根据所述筛选的数据,对所述原件进行筛选以获得按照图像方式曝光平版印刷版前体的筛选数据,所述平版印刷版前体具有 柔性支撑件,该柔性支撑件在所述成像曝光时具有能够区分油墨接收区和油墨排斥区的表面,并且可选地显影步骤,并且可选地显影如此获得的图像式曝光的平版印刷版前体,其特征在于所述屏蔽是 调频筛选。
    • 5. 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。