Method for manufacturing substrates for ps plates

Details Method for manufacturing substrates for ps plates Method for manufacturing substrates for ps plates

1990-09-13

1992-04-14

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

101453, 1014631, 156665, 156905, 20412935, B44C 122, C23F 100

Patent

active

051044846

ABSTRACT:
A method for manufacturing a substrate for presensitized plates for use in making lithographic printing plates comprises the steps of electrolytically surface-roughening an aluminum plate or an aluminum alloy plate in a nitric acid-containing electrolyte and then etching the surface with an alkali or an acid to thus form irregularity in the order of not more than 0.1 .mu.m within pits formed on the surface during the electrolytic surface roughening treatment. The method makes it possible to provide a lithographic printing plate stably and simultaneously having excellent printing durability and good resistance to background contamination of non-image areas.

REFERENCES:
patent: 3891516 (1975-06-01), Chu
patent: 4714528 (1987-12-01), Takeuchi et al.
patent: 4824757 (1989-04-01), Aono et al.
patent: 4872946 (1989-10-01), Uesugi et al.
patent: 4909894 (1990-03-01), Uesugi et al.

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