发明授权
US06811950B2 Presensitized plate useful for making lithographic printing plate and method for making lithographic printing plate therefrom 有权
用于制备平版印刷版的预感板和从其制造平版印刷版的方法

Presensitized plate useful for making lithographic printing plate and method for making lithographic printing plate therefrom
摘要:
The present invention relates to a presensitized plate useful for making a lithographic printing plate comprising an intermediate layer and a photopolymerizable photosensitive layer on an aluminum substrate in this order, wherein the roughness of a surface of said aluminum substrate (Ra) is in the range of 0.2 to 0.55 &mgr;m and the intermediate layer comprises a polymer compound comprising at least one monomer unit having a sulfonic acid group and a method for making a lithographic printing plate by imagewise exposing the presensitized plate described above and developing the imagewise exposed presensitized plate with a developer comprising an inorganic alkali salt and a nonionic surfactant comprising a polyoxyalkylene ether group. The presensitized plate or the method of the present invention provides a lithographic printing plate showing good contrast between an image area and non-image area, no background contamination during printing, good stability with time and good printing durability.
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