EP 0131970 B1 19861217 - PROCESS FOR THE PRODUCTION OF SULFURIC-ACID ADDUCTS OF UREA
Title (en)
PROCESS FOR THE PRODUCTION OF SULFURIC-ACID ADDUCTS OF UREA
Publication
Application
Priority
CH 143580 A 19800222
Abstract (en)
[origin: US4366232A] A method for processing exposed and developed photographic silver dye-bleach materials, in which the exposed and developed material is treated with aqueous bleaching preparations which contain (a) an acid component, (b) a silver complexing agent, (c) one or more bleach catalysts, (d) optionally an antioxidant, (e) optionally a water-soluble oxidizing agent and (f) optionally a bleaching accelerator. A water-soluble and as a rule solid adduct of an acid amide or a lactam and a strong mineral acid is used as acid component (a).
IPC 1-7
IPC 8 full level
G03C 5/44 (2006.01); G03C 7/02 (2006.01); G03C 7/28 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
BE CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0131970 A1 19850123; EP 0131970 B1 19861217; DE 3170675 D1 19850704; EP 0034793 A2 19810902; EP 0034793 A3 19821020; EP 0034793 B1 19850529; JP H0133820 B2 19890714; JP S56132340 A 19811016; US 4366232 A 19821228; US 4879413 A 19891107
DOCDB simple family (application)
EP 84108556 A 19810217; DE 3170675 T 19810217; EP 81101124 A 19810217; JP 2369881 A 19810221; US 23538881 A 19810217; US 24463288 A 19880912