EP 0121880 B1 19871014 - TWO-STEP PROCESS FOR THE PRODUCTION OF ANODICALLY OXIDIZED FLAT MATERIALS OF ALUMINIUM, AND THEIR USE IN THE PREPARATION OF OFFSET PRINTING PLATES
Title (en)
TWO-STEP PROCESS FOR THE PRODUCTION OF ANODICALLY OXIDIZED FLAT MATERIALS OF ALUMINIUM, AND THEIR USE IN THE PREPARATION OF OFFSET PRINTING PLATES
Publication
Application
Priority
DE 3312497 A 19830407
Abstract (en)
[origin: ES8501810A1] Disclosed is a process for the production of a material in the form of a plate, a foil or a strip, from aluminum or an alloy thereof, which has been chemically, mechanically and/or electrochemically roughened. The process comprises a two-stage oxidation involving a first stage (a) which is performed in an aqueous electrolyte having from about 60 to 180 g/l of phosphoric acid, at a temperature of the electrolyte bath of about 47 DEG to 70 DEG C. and at a voltage of about 36 to 80 V and a second stage (b) which is performed in an aqueous electrolyte having from about 60 to 300 g/l of sulfuric acid, at a temperature of the electrolyte bath of about 30 DEG to 65 DEG C. and at a voltage of about 15 to 35 V. Also disclosed is an offset-printing plate, having a radiation-sensitive coating and a support material produced by the process described above.
IPC 1-7
IPC 8 full level
C25D 11/08 (2006.01); B41N 3/00 (2006.01); B41N 3/03 (2006.01); C25D 11/12 (2006.01); C25D 11/16 (2006.01); C25D 11/18 (2006.01); C25D 11/20 (2006.01); C25D 11/24 (2006.01)
CPC (source: EP US)
B41N 3/034 (2013.01 - EP US); C25D 11/12 (2013.01 - EP US); Y10S 205/921 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0121880 A1 19841017; EP 0121880 B1 19871014; AT E30254 T1 19871015; AU 2638784 A 19841011; AU 559228 B2 19870226; BR 8401621 A 19841113; CA 1228049 A 19871013; DE 3312497 A1 19841011; DE 3466784 D1 19871119; ES 531015 A0 19841201; ES 8501810 A1 19841201; FI 76840 B 19880831; FI 76840 C 19881212; FI 841360 A0 19840405; FI 841360 A 19841008; JP H0437159 B2 19920618; JP S59193298 A 19841101; US 4566952 A 19860128; ZA 842333 B 19841128
DOCDB simple family (application)
EP 84103540 A 19840330; AT 84103540 T 19840330; AU 2638784 A 19840403; BR 8401621 A 19840406; CA 450525 A 19840327; DE 3312497 A 19830407; DE 3466784 T 19840330; ES 531015 A 19840327; FI 841360 A 19840405; JP 6683584 A 19840405; US 59553884 A 19840330; ZA 842333 A 19840329