Lithographic plate materials and method for making lithographic plates using the same

摘要

There is provided a lithographic plate material which can be desensitized by distilled water or a fountain solution used for other lithographic plates without desensitizing process using an etching solution and lowers generation of scumming in non-image portion of printed matters. The lithographic plate material has an image-receptive layer formed on a support consisting of at least polyvinyl alcohol cross-linked by tetra alkoxy silane hydrolysate, titanium oxide micropatricles, silica having an average particle size of not less than 1 nm and less than 100 nm. The image-receptive layer has a surface having an arithmetic mean roughness of not less than 0.40 mum and less than 1.20 mum and a contact angle of less than 50 degree to distilled water at room temperature, and is ink-receptive for hot-melt and lipophilic ink.