FLUESSIGE SCHWARZFARBSTOFFE.

摘要

Aq. black dyestuff mixts. contain the dyestuffs C.I. No. 19140, 40000 or 47035, in the form of their alkanolammonium salts, and also 4,4'-bis(7-amino-1-hydroxy-3 sulphonaphthyl-2-azo)-stilbene-2,2'-disulphate (I), 4,4'-bis(8-amino-1-hydroxy-3,6 -disulphonaphthyl-2-azo) -stilbene-2,2'-disulphate (II) and/or 4-(7-amino-1-hydroxy -3-sulphonaphthyl-2-azo)-4 -(8-amino-1-hydroxy-3,6 -disulphonaphthyl-2-azo) -stilbene-2,2'-disulphonate (III) of the formulae (I)-(III), where Rt = opt. different alkanolammonium, (substd.) ammonium or alkali cations; the amts. of the individual dystuffs being such that the mixt. is black. (I), (II) and (III) can be prepd. by standard methods.