Pretreatment liquor for preparing a textile substrate for ink-jet printing

An aqueous pretreatment liquor for preparing a textile substrate for ink-jet printing, containing (A) one or more polycationic compounds, (B) one or more thickeners, (C) optionally conventional additives, (D) water. Preferred polycationic compounds (A) are polymers or copolymers of diallyldialkylammonium monomers. Preferred thickeners are available from (I) polyether diols, (Ii) diisocyanates and be (iii) compounds of the general formula R-OH, R-SH, R-NH or (I) polyether diols with (Iv) compounds of the general formula R-OH or R-COOH, wherein R is a hydrophobic aliphatic or aromatic radical having at least 4 carbon atoms and R-OH may have been alkoxylated also, and further capable of forming an ether or Esterbindung derivatives these compounds or from the compounds (ii) and (iii).