Mitsubishi Paper Mills Limited

Koichi Torizuka

Kiyoshi Futaki

Mitsuhiro Ikeda

Shigeru Iguchi

Jun Maruyama

Shoji Hizatate

Hidekazu Sano

Tatsuya Kodera

Shozi Oka

Kazuyuki Iida

Organic photoconductive material and electrophotographic photoreceptor using the material

Disclosed is a reversible heat-sensitive recording material comprising a substrate and a recording layer formed thereon, said recording layer comprising a colorless or light-colored, electron-donating dye precursor and a specific electron-accepting compound capable of causing a reversible color tone change of the dye precursor on heating.

Reversible heat-sensitive recording material

The present invention provides a method for making a lithographic printing plate having high sensitivity and high printing endurance by scanner-exposing which comprises subjecting a photographic photosensitive material comprising a support and, provided thereon, an unfogged internal latent image type silver halide emulsion layer to scanner-exposing, subjecting the exposed photosensitive material to non-tanning development in the presence of a nucleating agent, and then subjecting the silver halide portion of the emulsion layer to an oleophilizing treatment.

Method for making lithographic printing plate

Disclosed is a light-sensitive photographic element for negative type lithographic printing plates high in sensitivity and contrast which comprises a support having thereon a light-sensitive silver halide, a metal salt particle having substantially no light-sensitivity, a compound which reacts with an oxidized developing agent produced by development to release a compond which acts as a solvent or a solution physical development accelerator for said metal salt particle and physical development nuclei.

Negative type lithographic printing plate

Growing community of inventors

Tokyo, Japan

Koichi Torizuka