Mixtures of fluids anionic highly concentrated

is proposed mixtures of aqueous fluids anionic highly concentrates having a solids content between 50 and 80% by weight containing - based on the proportion of surfactant - a) 60 to 90% by weight alkyl ether sulfates of formula (I), R 1 CO (CH2 CH2 O) n SO3 X wherein R1 represents a linear or branched alkyl radical having 12 to 22 carbon atoms, n represents a number from 1 to 10 and X1 represents an alkali metal, alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium, andb) from 10 to 40% by weight of alkyl sulfates of formula (II), R2 OSO3 X2 wherein R2 is a linear or branched alkyl radical having 12 to 22 carbon atoms, and X2 is an alkali metal, alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium, provided that the stated amounts complement to 100% by weight with the case cheant other surfactants.