The present invention provides a photosensitive resin composition for a relief printing original plate which can achieve both of a printing reproducibility of gradation of a highlight part and a printing durability, and can further achieve a low plate surface tackiness. A photosensitive resin composition for a relief printing original plate containing water-soluble or water-dispersible polyamide, a photopolymerizable unsaturated compound and a photopolymerization initiator as essential ingredients, characterized in that a total of a content of an alicyclic structural unit obtained from diamine and a content of an alicyclic structural unit obtained from dicarboxylic acid in the polyamide is 30 to 90 molar %, and the content of the alicyclic structural unit obtained from dicarboxylic acid in the polyamide is 20 molar % or more.
本发明提供了一种用于浮雕印刷原版的感光
树脂组合物,该组合物既能实现高光部分色阶的印刷再现性和印刷耐久性,又能进一步实现低版面粘性。一种用于浮雕印刷原版的感光
树脂组合物,以
水溶性或
水分散性聚酰胺、可光聚合的不饱和化合物和光聚合
引发剂为主要成分,其特征在于聚酰胺中由二胺得到的脂环结构单元和由二
羧酸得到的脂环结构单元的总含量为 30 至 90 摩尔%,聚酰胺中由二
羧酸得到的脂环结构单元的含量为 20 摩尔%或更多。