Patent ID: 6455224
Filing Date: 2002-09-24
Classification: B41C,B41M

Abstract:
A lithographic printing plate precursor comprising a support with a hydrophilic surface having thereon a photosensitive layer containing 6 wt % or more of an infrared absorbent which changes from hydrophilic to hydrophobic by heat and containing a hydrophilic polymer compound having a functional group represented by formula (6), wherein the photosensitive layer is capable of being dissolved and developed by water or an aqueous solution: wherein X represents â€”O', â€”Sâ€”, â€”Se', â€”NR3â€”, â€”COâ€”, â€”SOâ€”, SO2â€”, â€”POâ€”, â€”SiR3R4â€” or â€”CSâ€”, R1, R2, R3 and R4 each independently represents a monovalent group, and M represents ion having a positive charge.