Patent ID: 7078146

Claim:
A planographic printing plate material comprising a plastic sheet support, and provided thereon, a hydrophilic layer, a silver halide emulsion layer, a physical developing nucleus-containing layer, and a backing layer, wherein the hydrophilic layer, the silver halide emulsion layer, and the physical developing nucleus-containing layer are provided on one side of the support, and the backing layer is provided on the other side of the sheet opposite the silver halide emulsion layer, and wherein a surface on the backing layer side has a specific resistance of from 1×10 11 to 1×10 13 Ω, and a coefficient of dynamic friction of from 0.15 to 0.6, the coefficient of dynamic friction being one of the surface on the backing layer side to a stainless steel surface, and wherein the planographic printing plate material is wound around a core with a diameter of from 4 to 10 cm to be in the form of roll.