Process for producing aluminum support for lithographic printing

Details Process for producing aluminum support for lithographic printing Process for producing aluminum support for lithographic printing

1990-07-16

1991-12-24

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

156665, 2041294, 20412975, 205214, C25F 304

Patent

active

050749765

ABSTRACT:
A process for producing an aluminum support for a lithographic printing plate is disclosed, which comprises etching a surface of an aluminum plate, particularly an aluminum plate containing manganese, with an alkali etching solution in such a manner that from 0.01 to 1.0 g/m.sup.2 of aluminum is removed, chemically etching in an aqueous solution containing sulfuric acid in such a manner that from 0.001 to 5.0 g/m.sup.2 of aluminum is removed, and subsequently subjecting the aluminum plate to electrolytic graining in an acidic electrolytic solution. The aluminum support has a uniform grain and provides a lithographic printing plate excellent in printing durability and stain resistance.

REFERENCES:
patent: 4166015 (1979-08-01), Raether
patent: 4272342 (1981-06-01), Oda et al.
patent: 4561944 (1985-12-01), Sasaki et al.
patent: 4576686 (1986-03-01), Hirokazu et al.
patent: 4851091 (1989-07-01), Uesugi et al.

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