Process for the preparation of concentrated aqueous solutions of chromium complexes of azo or azomethinic dyes bearing sulfo groups

Konzentrierte, wasserhaltige Lösungen ,von Chromkomplexen sulfogruppenhaltiger Azo- und/oder Azomethinfarbstoffe erhält man durch Kupplung und Metallisierung ohne Zwischenisolierung in Wasser-Lactam-Gemischen in Gegenwart organischer Basen und/oder Ammoniak. 1. Process for the preparation of concentrated aqueous solutions of the chromium complexes of dyestuffs of the formula see diagramm : EP0088271,P4,F1 in which R1 = H or NO2 R2 = see diagramm : EP0088271,P4,F2 or see diagramm : EP0088271,P4,F3 or of alkali metal salts thereof, by alkaline coupling and subsequent metallisation, characterised in that the coupling and metallisation are carried out without intermediate isolation in an aqueous medium which contains 2-25% by weight of a lactam of the formula see diagramm : EP0088271,P4,F4 in which x = 3-11 and R = CH3 or H, and an organic base and/or ammonia and no further water-miscible solvents.