Patent ID: 7087362
Filing Date: 2006-08-08
Classification: B41C,Y10S

Abstract:
1. A process for producing a heat mode-compatible positive planographic printing plate precursor comprising a support and a photosensitive layer whose solubility in an aqueous alkali solution increases upon heat-mode exposure, comprising the steps of: applying a photosensitive layer coating solution onto the support; and drying the photosensitive layer coating solution at a drying temperature not less than 150° C. and not greater than 200° C. and for a drying time of 20 to 110 seconds, wherein the photosensitive layer coating solution is obtained by dissolving or dispersing a photosensitive composition in a solvent; the photosensitive composition contains a polymer insoluble in water but soluble in an aqueous alkali solution; the solvent comprises a low-boiling solvent with a boiling point of 130° C. or less and a high-boiling solvent with a boiling point of greater than 130° C.; and the residual solvent in the photosensitive layer is 5% by weight or less relative to the weight of the photosensitive layer.