Process for the surface treatment of lithographic printing plate

Details Process for the surface treatment of lithographic printing plate Process for the surface treatment of lithographic printing plate

1995-04-10

1996-09-03

Powell, William

Etching a substrate: processes

Forming or treating an article whose final configuration has...

216102, C23F 100

Patent

active

055515851

ABSTRACT:
A process is disclosed to produce a fine honeycomb grain with matte finishing on an aluminum surface in alkaline solution with or without electrical treatment. To achieve the fine honeycomb, a passivation enhancement step is used prior to alkaline etching with or without electricity. The matte appearance with fine honeycomb topography on the aluminum surface is produced by silicating raw aluminum prior to alkaline etching.

REFERENCES:
patent: 2311047 (1943-02-01), Hagelin
patent: 3615948 (1971-10-01), Krostewitz
patent: 5074976 (1991-12-01), Uesugi et al.

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