Light-sensitive composition for positive-type light-sensitive lithographic printing plates

摘要

A light-sensitive composition for use in the preparation of positive- type light-sensitive lithographic printing plate which comprises an o- naphthoquinone diazide compound and novolak resin in which the novolak resin comprises two different novolak resins each being prepared by the polycondensation or co-polycondensation of an aldehyde with at least one compound selected from the group consisting of phenol, m-cresol, o-cresol, and p-cresol.