A process for coloring textile substrates, aqueous pretreatment liquors and their use for the pretreatment of textile substrates

A process for coloring textile substrates, characterized in that textile substrates (A) pretreated with an aqueous pretreatment liquor containing (A) at least one resin selected from melamine derivatives, dimethyloldihydroxyethyleneurea (DMDHEU) and derivatives of DMDHEU, and (B) at least one thickener, and thereafter (B) printed by the ink jet process.