Aluminum support for planographic printing plate, its...

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

Reexamination Certificate

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Details

C430S270100, C430S281100, C430S286100, C430S302000, C430S309000, C430S494000, C430S944000, C430S945000

Reexamination Certificate

active

11015079

ABSTRACT:
Disclosed is a process for manufacturing an aluminum support for a planographic printing plate material, the process comprising the steps of electrolytically surface-roughening an aluminum plate in an electrolytic solution, employing a sinewave alternating current; and anodizing the surface-roughened aluminum plate, the electrolytically surface-roughening step comprising a first stage of electrolytically surface-roughening the aluminum plate in a first electrolytic solution containing hydrochloric acid as a main component at a current density of D1for t1at a quantity of electricity of Q1and a second stage of electrolytically surface-roughening the aluminum plate in a second electrolytic solution containing hydrochloric acid as a main component at a current density of D2for t2at a quantity of electricity of Q2.

REFERENCES:
patent: 6103087 (2000-08-01), Mori
patent: 2003/0031860 (2003-02-01), Hotta et al.
patent: 2004/0055490 (2004-03-01), Sampei
patent: 2005/0199505 (2005-09-01), Takagi

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