EP 0149833 B1 19870429 - PROCESS FOR ELECTROLYTIC ROUGHENING ALUMINIUM PRINTING PLATES IN AN AQUEOUS MIXED ELECTROLYTE
Title (en)
PROCESS FOR ELECTROLYTIC ROUGHENING ALUMINIUM PRINTING PLATES IN AN AQUEOUS MIXED ELECTROLYTE
Publication
Application
Priority
DE 3400250 A 19840105
Abstract (en)
[origin: US4566960A] In the electrochemical roughening of aluminum or its alloys useful for printing plate supports, an aqueous mixed electrolyte solution is employed, which contains nitric acid (HNO3) and, as a further inorganic electrolyte, at least one inorganic fluorine compound which is present in the form of an acid or an alkali metal salt (e.g., HF or NaF) 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 0.3 to 4% by weight of HNO3 and from about 0.05 to 5% by weight of the fluorine compound. The very uniformly roughened support materials are used in the production of offset printing plates.
IPC 1-7
IPC 8 full level
B41N 1/08 (2006.01); B41N 3/00 (2006.01); B41N 3/03 (2006.01); C25F 3/04 (2006.01)
CPC (source: EP US)
B41N 3/034 (2013.01 - EP US); C25F 3/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0149833 A2 19850731; EP 0149833 A3 19850911; EP 0149833 B1 19870429; CA 1270791 A 19900626; DE 3400250 A1 19850718; DE 3463399 D1 19870604; JP H0522597 B2 19930330; JP S60159094 A 19850820; US 4566960 A 19860128
DOCDB simple family (application)
EP 84116022 A 19841221; CA 471473 A 19850104; DE 3400250 A 19840105; DE 3463399 T 19841221; JP 27425484 A 19841227; US 68900385 A 19850104