Basf Aktiengesellschaft

Rudolf Kruger

Peter Miederer

Manfred Gang

Eberhard Beckmann

Peter Schultz

Georg Schnitzer

Harald Schluter

Gert Rainer Kuhnel

Manfred R Wolf

Leuco vat dye preparations in granule form

The disclosure is a process for batchwise dyeing of cellulosic textile material with indigo by the exhaust method, which comprises applying the reduced indigo to the textile material from an aqueous dyeing liquor which includes a reductant, an alkali and additionally a further dissolved alkali metal salt in a concentration of from 200 to 350 g/l as electrolyte and whose pH has been set to 10.2-11.3, oxidizing the reduced indigo on the fiber back to the pigment while maintaining the high electrolyte concentration, and finishing the dyeing in a conventional manner.

Batchwise dyeing of cellulosic textile material with indigo by the

Leuco vat-dye preparations in granule form

Growing community of inventors

Weisenheim, Germany

Rudolf Kruger