EP 0162282 A3 19851227 - PROCESS FOR THE ELECTROCHEMICAL ROUGHENING OF ALUMINIUM PRINTING PLATE SUPPORTS IN AN AQUEOUS MIXED ELECTROLYTE
Title (en)
PROCESS FOR THE ELECTROCHEMICAL ROUGHENING OF ALUMINIUM PRINTING PLATE SUPPORTS IN AN AQUEOUS MIXED ELECTROLYTE
Publication
Application
Priority
DE 3415363 A 19840425
Abstract (en)
[origin: US4626328A] Disclosed is a process for electrochemically roughening aluminum or aluminum alloys for use as printing plate supports, in an aqueous mixed electrolyte solution containing hydrochloric acid (HCl) and, as additional electrolytes, at least one organic acid selected from the group consisting of diphosphonic acids, polyphosphonic acids and gallic acid. In particular, the solution contains from 0.5 to 10.0% by weight of HCl and from 0.05 to 5.0% by weight of the organic acid (for example, 1-hydroxy-ethane-1,1-diphosphonic acid). The support materials which are particularly uniformly roughened are employed 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)
Citation (search report)
[A] CHEMICAL ABSTRACTS, Band 80, Nr. 14, 08. April 1974, Seite 186, Nr. 73548w, Columbus, Ohio, US; & JP - A - 73 29 466 (SHOWA DENKO K.K.) 10.09.1973
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0162282 A2 19851127; EP 0162282 A3 19851227; EP 0162282 B1 19870819; DE 3415363 A1 19851031; DE 3560490 D1 19870924; JP S60234897 A 19851121; US 4626328 A 19861202
DOCDB simple family (application)
EP 85104604 A 19850416; DE 3415363 A 19840425; DE 3560490 T 19850416; JP 8665185 A 19850424; US 72624585 A 19850423