Method for producing an aluminum support for a lithographic prin

Details Method for producing an aluminum support for a lithographic prin Method for producing an aluminum support for a lithographic prin

1998-04-24

2000-11-07

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating substrate prior to coating

205658, 205660, 205662, 205672, 205674, C25D 534, B23H 1100, C25F 300

Patent

active

061431583

ABSTRACT:
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.sup.2 to 200 A/dm.sup.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.

REFERENCES:
patent: 4536264 (1985-08-01), Masuda et al.
patent: 4561944 (1985-12-01), Sasaki et al.
patent: 4902389 (1990-02-01), Nishino et al.
patent: 5141605 (1992-08-01), Nishino et al.

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