Provided are a thermal fusion-type lithographic printing plate precursor in which the visibility is excellent, ablation during laser exposure is suppressed, and the contamination of dampening water and printing ink during on-machine development is suppressed by a lithographic printing plate precursor having a support and an image-recording layer, in which the image-recording layer is capable of forming an image by infrared laser exposure, a non-exposed portion of the image-recording layer is removable by at least one of dampening water and printing ink on a printer, and the image-recording layer contains (1) a color developing system in which a hue change generated by infrared laser exposure is Δa/Δb≥0.6 and (2) 70% by mass or more of a thermoplastic polymer particle with respect to a solid content of the image-recording layer and a plate-making method in which the thermal fusion-type lithographic printing plate precursor is used.
本发明提供了一种热熔型平版印刷板原型,该原型具有一个支撑件和一个图像记录层,其可视性极佳,可抑制激光曝光过程中的烧蚀,并可抑制机上显影过程中的润湿
水和印刷油墨污染、其中,图像记录层能够通过红外激光曝光形成图像,图像记录层的非曝光部分可通过打印机上的润湿
水和印刷油墨中的至少一种去除,图像记录层包含(1)显色系统,其中通过红外激光曝光产生的色调变化为Δa/Δb≥0.6 和 (2) 相对于图像记录层的固体含量,热塑性聚合物颗粒的质量百分比为 70% 或更多,以及使用热熔型平版印刷板前体的制版方法。