Process for producing support for presensitized lithographic pri

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making

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430155, 430158, 430159, 430160, 430161, 430166, 430167, 430278, 204 17, 204 33, 204 58, G03C 194, C25D 1106

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048330655

ABSTRACT:
In a process for producing a support for a lithographic printing plate, at least one surface of an aluminum sheet is subjected to roughening treatment and subsequently to anodic oxidation treatment at a current density of at least 1 A/dm.sup.2 in an electrolytic solution containing 0.1 to 5% by weight of an alkaline electrolyte. Even if scratches are formed on non-image areas of a printing plate prepared from the support according to the invention, such scratches cause less stains on a printed matter.

REFERENCES:
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patent: 3834998 (1974-09-01), Watanabe
patent: 3891516 (1975-06-01), Chu
patent: 3902976 (1972-09-01), Walls
patent: 4468295 (1984-08-01), Pliefke
patent: 4476006 (1984-10-01), Ohba et al.
patent: 4477317 (1984-10-01), Chu et al.
patent: 4492616 (1985-01-01), Pliefke et al.
patent: 4554216 (1985-11-01), Mohr
patent: 4608131 (1986-08-01), Brenk
patent: 4689272 (1987-08-01), Simon et al.
S. Wernick, "The Surface Treatment and Finishing of Aluminum and its Alloys", vol. 1, pp. 455-457, 1972.

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