Aluminium alloy substrate for lithographic printing plate and process of producing same.

摘要

A continuously cast and rolled aluminum alloy substrate for an electrolytically grainable lithographic printing plate, consisting of 0.20 to 0.80 wt% of Fe and the balance of Al, grain-refining elements and unavoidable impurities including 0.3 wt% or less of Si and 0.05 wt% or less of Cu, the amount of Fe present in solid solution being not more than 250 ppm, the amount of Si present in solid solution being not more than 150 ppm, and the amount of Cu present in solid solution being not more than 120 ppm.