Thermally developable photothermographic material for making a printing plate, printing plate made thereof and preparation method thereof

摘要

A photothermographic light-sensitive material for making a printing plate comprising a support having thereon a light-sensitive layer containing light-sensitive silver halide grains, organic silver salt grains, a reducing agent and a binder, wherein the organic silver salt grain comprises a organic silver salt having 10 or more of carbon atoms and the photothermographic light-sensitive material has an outermost layer at a light-sensitive layer side of the support having a coefficient of water absorption of not less than 0.7%.