Support for lithographic printing plate, process for the prepara

Details Support for lithographic printing plate, process for the prepara Support for lithographic printing plate, process for the prepara

1996-03-06

1998-11-17

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428116, 428118, 428156, 428182, 428212, 101453, B32B 300, D06N 704, B41N 100

Patent

active

058373454

ABSTRACT:
A support for a lithographic printing plate having a corrugated surface processed by roughening, wherein the corrugation on the support surface comprises big corrugation having an average pitch of from not less than 5 .mu.m to not more than 30 .mu.m, and middle corrugation superimposed on the big corrugation, the middle corrugation comprising honeycomb pits having an average diameter of from not less than 0.5 to not more than 3.0 .mu.m, and the support surface has a surface inclination distribution which comprises an inclination of not less than 30 degrees in a proportion of from not less than 5% to not more than 20% as determined by an atomic force microscope. A process for the preparation of the support and an electrolytic treatment apparatus for the process are also described.

REFERENCES:
patent: 4087341 (1978-05-01), Takahashi et al.
patent: 4301229 (1981-11-01), Sakaki et al.
patent: 4476006 (1984-10-01), Ohba et al.
patent: 4919774 (1990-04-01), Minato et al.
patent: 4976198 (1990-12-01), Ohba et al.
patent: 5328573 (1994-07-01), Kawasumi et al.
patent: 5340685 (1994-08-01), Sekiya

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