POSITIVE PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLATE AND METHOD FOR PRODUCING THE SAME

• Main Authors: HIDAKA KATSUHIKO, TSURUYA YASUYUKI
• Format: Patent
• Language: English
• Published: 12.03.2002
• Edition: 7
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTROGRAPHY; HOLOGRAPHY; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; MATERIALS THEREFOR; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORIGINALS THEREFOR; PERFORMING OPERATIONS; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING PLATES OR FOILS; STAMPS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYPEWRITERS; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide a positive photosensitive composition having a wide development latitude. SOLUTION: In the positive photosensitive planographic printing plate with a positive type photosensitive composition layer containing (A) a photothermal converting material and (B) an alkali-soluble resin on a substrate, the velocity of dissolution of the photosensitive composition layer satisfies the relation of V2/V1>=2.5 (where V1 is the velocity of dissolution of the photosensitive composition layer from the surface to 10% of the thickness in an alkali developing solution and V2 is the velocity of dissolution of the photosensitive composition layer from the surface to 80% of the thickness in the alkali developing solution) and the photosensitive layer contains (C) a surfactant having an HLB hydrophile-lipophile balance) of <10.