ALUMINUM ALLOY PLATE FOR LITHOGRAPHIC PRINTING PLATE, LITHOGRAPHIC PRINTING PLATE SUPPORT, PRESENSITIZED PLATE, METHOD OF MANUFACTURING ALUMINUM ALLOY PLATE FOR LITHOGRAPHIC PRINTING PLATE AND METHOD OF MANUFACTURING LITHOGRAPHIC PRINTING PLATE SUPPORT

摘要

An aluminum alloy plate for a lithographic printing plate capable of obtaining a lithographic printing plate having an excellent resistance to spotting, a method of manufacturing such aluminum alloy plate, a lithographic printing plate support obtained by using such aluminum alloy plate, and a presensitized plate and in particular an on-machine developable presensitized plate are provided. The aluminum alloy plate contains 0.08 to 0.45 wt % of iron and to 0.20 wt % of silicon, with the balance being inadvertent impurities and aluminum, and the content of aluminum-iron intermetallic compounds is not more than 0.05 wt %.