Cationic polyazo dyestuffs, their stable solutions, their prepar
Chrome-complex dyes and the production and use thereof for dyein
Chromium complex dye for polyamides or leather
Composition of 4-amino-4'-nitrostilbene-2,2'-disulphonic acid di
Compositions for the dyeing of leather
Copper, cobalt or chromium complex monoazo compounds, processes