Title: Process for electrochemical roughening of aluminum used as printing plate supports in an aqueous mixed electrolyte
Application Number: 85101448 Application Date: 1985.04.01
Publication Number: 1007630 Publication Date: 1987.01.24
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B41N3/02,C25F3/04
Applicant(s) Name: Hoechst AG (DE) Rheingaustrabe 190 6200 Wiesbaden Address:
Inventor(s) Name:
Attorney & Agent: LUO YINGMING TIANG YUE
Abstract:
     In the course of electrochemical roughening Al or Al alloy material used as printing plate support, the mixed aqueous electrolyte contains HCl and at least fluorine-containing inorganic compound which is one of halogen ions-containing compound. The said electrolyte appears in acid or basic metal form and the anions of which contain fluorine element and at least another element (such as Si F6 2- or PO3F 2-). Concretely, the electrolyte contains 0.5-10% HCl in wight and 0.05-5% fluorine-containing compound in weight. The extremely evenly roughened Al plate support may be used as offset plate.
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