Abstract: A method and device for dyeing a textile substrate with reactive dyes, in which the textile substrate is brought in contact with a dyeing liquor containing at least one dye and after a predetermined dyeing time, the dyed textile substrate is rinsed. The dye which has not been fixed by the textile substrate and is present in the dyeing liquor is destroyed by a chemical and/or physical treatment so that the dyeing liquor is largely colourless hereafter, whereby the textile substrate being rinsed with the largely decolourised liquor. The comprises a vessel for receiving the textile substrate to be dyed and a circulation system for the dyeing liquor.