Planographic printing plate precursors, stacks of planographic printing plate precursors , and methods of making planographic printing plates

摘要

A planographic printing plate precursor comprising an aluminum support having a hydrophilic front surface, and a negative recording layer provided on the front surface, wherein the negative recording layer includes polymerizable compound, a radiation absorber, and a compound that generates a radical upon application of radiation or heat, and a Bekk smoothness of a back surface of the planographic printing plate precursor is 1000 seconds or less. Also provided are a stack of the planographic printing plate precursors and a method of making a planographic printing plate using the planographic printing plate precursor.