4.
    发明专利
    未知

    公开(公告)号:ITMI971587A1

    公开(公告)日:1999-01-04

    申请号:ITMI971587

    申请日:1997-07-04

    Applicant: BASF AG

    Abstract: 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.

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