EP 0161608 B1 19870812 - PROCESS FOR THE AFTERTREATMENT OF LAYERS FROM ALUMINIUM OXIDE WITH AQUEOUS SOLUTIONS CONTAINING PHOSPHOROXO ANIONS, AND THEIR USE IN THE PRODUCTION OF SUPPORTS FOR OFFSET PRINTING PLATES
Title (en)
PROCESS FOR THE AFTERTREATMENT OF LAYERS FROM ALUMINIUM OXIDE WITH AQUEOUS SOLUTIONS CONTAINING PHOSPHOROXO ANIONS, AND THEIR USE IN THE PRODUCTION OF SUPPORTS FOR OFFSET PRINTING PLATES
Publication
Application
Priority
DE 3418111 A 19840516
Abstract (en)
[origin: US4650739A] A process for manufacturing materials in the form of sheets, foils or webs comprising chemically, mechanically and/or electrochemically roughened and anodically oxidized aluminum or one of its alloys, wherein the resultant aluminum oxide layers are post-treated with an aqueous solution containing phosphoroxo anions, is performed such that a post-treatment of the aluminum oxide layers is effected by immersion in an aqueous solution containing hexametaphosphate anion. In a preferred embodiment, the aqueous solution is adjusted to a pH of 1 to 5 by addition of an acid. The resulting materials, which have reduced adsorption properties, are preferably employed as support materials for offset printing plates.
IPC 1-7
IPC 8 full level
B41N 3/00 (2006.01); B41N 1/08 (2006.01); B41N 3/03 (2006.01); C25D 11/24 (2006.01)
CPC (source: EP US)
B41N 3/038 (2013.01 - EP US); C25D 11/24 (2013.01 - EP US); Y10S 205/921 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0161608 A1 19851121; EP 0161608 B1 19870812; BR 8502292 A 19860121; CA 1271958 A 19900724; DE 3418111 A1 19851121; DE 3560465 D1 19870917; JP H0545437 B2 19930709; JP S60253597 A 19851214; US 4650739 A 19870317; ZA 853680 B 19851224
DOCDB simple family (application)
EP 85105492 A 19850506; BR 8502292 A 19850515; CA 481442 A 19850514; DE 3418111 A 19840516; DE 3560465 T 19850506; JP 10282585 A 19850516; US 73414785 A 19850515; ZA 853680 A 19850515