A process for continuously dyeing cellulosic yarn with indigo in a single train

Containing reducing agent, alkali, and in addition a further dissolved alkali metal salt A process for continuously dyeing cellulosic yarn with indigo in a single train, the reduced indigo from an aqueous dye liquor is applied to the yarn as an electrolyte, wherein the pH of the dye liquor to 10.2 is adjusted to 11.3, and wherein the drawn onto the fiber again reduced indigo oxidized to the pigment and the dyeing is finished in a conventional manner, characterized in that the electrolyte in the dye bath in a concentration of 200 to 350 g / l is included and that the reduced indigo is oxidized while maintaining the high electrolyte concentration.