SUPPORTING BODY FOR PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE, ITS MANUFACTURING METHOD AND PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing plate material with good resistance to a processing liquid on a printing machine, excellent printing wear, and excellent stain resistance during printing, a supporting body providing it and a method for manufacturing the printing plate.;SOLUTION: In a method for manufacturing the supporting body for the photosensitive lithographic printing plate formed by applying a roughened processing on an aluminum plate or an aluminum alloy plate, then applying an anodizing processing, and furthermore, applying an after-treatment, the supporting body for the photosensitive lithographic printing plate, its manufacturing method and the photosensitive lithographic printing plate material are characterized in that the after-treatment is a treatment with a polyvinyl phosphonic acid water solution or the treatment with the polyvinyl phosphonic acid water solution after treatment with sodium silicate, and thereafter, the after-treated aluminum plate or aluminum alloy plate is washed with a water solution with a pH of 4-9 and a liquid temperature of 70-90°C.;COPYRIGHT: (C)2007,JPO&INPIT