MANUFACTURING METHOD FOR SUBSTRATE FOR LITHOGRAPHIC PRINTING PLATE, SUBSTRATE FOR THE SAME AND PS PLATE

摘要

PROBLEM TO BE SOLVED: To provide the manufacturing method for a substrate for lithographic printing plate, which obtains a PS plate without generating faulty appearance in the surface of a printing paper, and the PS plate not generating the faulty appearance in the surface of a printing paper.;SOLUTION: The substrate for lithographic printing plate is manufactured by a method wherein mechanical surface roughening treatment, which rubs by a rotary brush while supplying the grains of grinding material having an average grain size of 5-70 μm, the content of grains having the grain size of 100 μm or more is 10 wt.%, or less the content of grains having the grain size of 500 μm or less is 1 wt.% or less and the content of SiO2 grain is 90 wt.% or more, is applied on at least one side of the substrate. A light sensitive layer is formed on the substrate, obtained by the manufacturing method, to obtain the PS plate.;COPYRIGHT: (C)2001,JPO