heat sensitive composition for image generation on a thermal CTP printing plate

摘要

A photosensitive composition for forming an image on a thermal CTP(computer on plate) printing plate is provided to allow a printing plate of high quality to be prepared even with a small amount of laser beam. A photosensitive composition for forming an image on a thermal CTP printing plate comprises 3-7 wt% of an IR absorbing dye; 50-90 wt% of a resin; 2-4 wt% of a dye; and 0.01-30 wt% of a metal particle. Preferably the metal particle is at least one selected from the group consisting of copper(Cu), zinc(Zn), tin(Sn), magnesium(Mg), manganese(Mn), chromium(Cr), iron(Fe), titanium(Ti), nickel(Ni), aluminum(Al), gold(Au) and silver (Ag), and has a particle size of 50 nm to 30 micrometers.