Method for producing an aluminum support for a lithographic printing plate

摘要

Disclosed is a method for producing an aluminum support for a lithographic printing plate comprising the steps of (a) electrolytic polishing an aluminum plate in an alkaline aqueous solution; and (b) electrochemically surface roughening the aluminum plate using direct or alternating current in an acidic aqueous solution in this order, and also a method for producing an aluminum support for a lithographic printing plate comprising an electrolytic polishing step of treating an aluminum plate used as an anode in an alkaline aqueous solution at a current density of 5 A/dm<2> to 200 A/dm<2> while allowing the alkaline aqueous solution to flow between the aluminum plate and an electrode at an average flow rate of 10 cm/second to 400 cm/second.