ALUMINUM ALLOY PLATE FOR LITHOGRAPHIC PRINTING FORM AND METHOD FOR PRODUCTION THEREOF AND LITHOGRAPHIC PRINTING FORM

• Main Authors: YAMAGUCHI, KEITAROU, ISHIDA, MITSUO
• Format: Patent
• Language: English; French; German
• Published: 13.05.2009
• Edition: 7
• Subjects: ALLOYS; APPARATUS THEREFOR; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; METALLURGY; PERFORMING OPERATIONS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING PLATES OR FOILS; PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS; STAMPS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TYPEWRITERS

The present invention provides an aluminum alloy plate for use as a lithographic printing plate having an improved uniformity of a surface roughened by electrolytic etching and wherein streaking does not occur, and a method for producing the same. The present invention is characterized in comprising, in wt%, Fe: 0.1 to 0.6 %; Si: 0.02 to 0.2 %; Cu: 0.001 to 0.02 %; Zn: 0.01 to 0.1 %; Mg: 0.005 to 0.1 %; Ti: 0.001 to 0.05%, and the remainder Al and inevitable impurities, and an average value of the crystal particle size is 60 mu m or less in a direction perpendicular to the rolling direction.