PURPOSE: To obtain the planographic printing plate for scanning type exposing having a high sensitivity, hard contrast, high plate wear, high water retention, and excellent preservable property by incorporating a bisphenol type epoxy resin latex into a primer coating layer.
CONSTITUTION: The bisphenol type epoxy resin latex is incorporated into the primer coating layer of the planographic printing plate for scanning type exposing having at least one primer coating layer, silver halide emulsion layer and surface physical development nucleus layer on a base. The planographic printing plate for which scanning type exposing light sources, such as laser beam and more particularly, semiconductor laser beam, IR laser beam and red light emitting diode, having the light emission wavelength within 600 to 800nm are used as light sources and for which the silver complex salt diffusion method of the high sensitivity, the hard contrast, the high plate wear, the high water retention, and the excellent preservable property is utilized is obtd. in this way.
YOSHIDA AKIO
ISHIKURA HIROYUKI
