A lithographic printing plate precursor is disclosed which comprises a support having a hydrophilic surface or which is provided with a hydrophilic layer, and a coating thereon, said coating comprising an IR absorbing agent and a contrast enhancing compound, characterized in that said contrast enhancing compound has the structure of formula (I). The printing plate comprising the contrast enhancing compound improves the thermoresponsivity of the coating and is capable of improving the resistance of the coating in the non-exposed areas against the alkaline developer.
本发明揭示了一种平版印刷版前体,其包括具有亲
水表面或具有亲
水层的支撑体和涂层,所述涂层包括红外吸收剂和增强对比度化合物,并且所述增强对比度化合物具有公式(I)的结构。包含增强对比度化合物的印刷版提高了涂层的热响应性,并且能够提高非曝光区域对碱性显影剂的抵抗性。