Support for planographic printing plate

Details Support for planographic printing plate Support for planographic printing plate

1994-07-22

1996-04-16

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148692, C22F 104

Patent

active

055078877

ABSTRACT:
Disclosed is a support for planographic printing plate prepared by a process which comprises subjecting molten aluminum alloy to continuous casting by a twin-roll continuous casting machine to directly caste a plate, subjecting the plate to cold rolling and heat treatment once or more times, respectively, reforming the plate, and then surface graining the plate, wherein crystalline grains on a cross section of the finished plate (a) have an average diameter in circle equivalence of 15 .mu.m to 35 .mu.m, (b) contain those having an average diameter in circle equivalence of not less than 40 .mu.m in a proportion of not more than 30% and (c) assume a shape factor of not less than 4.0.

REFERENCES:
patent: 5078805 (1992-01-01), Uesugi et al.
patent: 5350010 (1994-09-01), Sawada et al.

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