A method for preparation of a lithographic printing plate and a lithographic printing plate produced by said method

摘要

thod of preparation of a Lithographic Printing Plate comprising the A meof, selecting a substrate for making of the printing plate from a natural steps ***FAX***thetic polymeric sheet element material having a tensile strength in the or syn***FAX***of 400 to 3000 Kgm/cm2 and thickness ranging from 75 microns to range ***FAX***icrons; shrinking the said substrate to have shrinkage in the range of 250 m***FAX*** 2.0 % by exposing the substrate to heat of temperatures ranging from 0.2 to***FAX*** 180 degrees Celsius for 8 to 12 minutes; subbing the substrate to alter 140 t***FAX***rface energy of the substrate; forming a hydrophilic lithographic the s***FAX***tg by reacting a hydrophilic binder with a cross linking agent, an coatin***FAX***rator, at least one pigment, at least one cationic surfactant and acceler***FAX***late silica having micron size ranging between 1 to 5 microns and a partic***FAX***tolume ranging between 0.2ml/gm to 1.8 ml/gm wherein the ratio of pore ***FAX***catalyst to accelerator to cross linking agent to binder to pigment to the ca***FAX***c surfactant to particulate silica is 1:2 to 1: 2 to2: 1 to20: 25 to 60:80 anioni***FAX***ind applying at least one ply of the hydrophilic lithographic coating on parts ***FAX***abbed substrate. the su