Document Type and Number:
Japanese Patent JPH0462279
Kind Code:
B2
Abstract:
In the electrochemical roughening of aluminum or its alloys useful for printing plate supports, an aqueous mixed electrolyte solution is employed, which contains hydrochloric acid (HCl) and, as a further ionic halogen compound, at least one inorganic fluorine compound which is present in the form of an acid or an alkali metal salt and the anion of which contains fluorine and at least one further element (for example, SiF62- or PO3F2-). In particular, the solution contains from about 0.5 to 10% by weight of HCl and from about 0.5 to 5% by weight of the fluorine compound. The very uniformly roughened support materials are used in the production of offset printing plates.
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Inventors:
DEIITAA MOORU
Application Number:
JP27425384A
Publication Date:
October 05, 1992
Filing Date:
December 27, 1984
Export Citation:
Assignee:
HOECHST AG
International Classes:
B41N1/08; B41N3/00; B41N3/03; C25F3/04
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