PROCEDIMENTO PER TINGERE IN CONTINUO CON INDIGO IN UN'UNICA PASSSATA FILATO CONTENENTE CELLULOSA

PROCEDIMENTO PER TINGERE IN CONTINUO CON INDIGO IN UN'UNICA PASSSATA FILATO CONTENENTE CELLULOSA

Continuous dyeing of cellulose-containing yarn with indigo in a single operation is disclosed, in that the reduced indigo from an aqueous dye liquor containing reducing agents, alkali, and additionally a further dissolved alkali metal salt in a concentration of 200 to 350 g/l as the electrolyte, and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUTSCH FRANZ, KRUGER RUDOLF
Format: Patent
Sprache:ita
Schlagworte:
DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM
DYEING OR PRINTING TEXTILES
FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
LAUNDERING
TEXTILES
TREATMENT OF TEXTILES OR THE LIKE
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Beschreibung
Zusammenfassung:Continuous dyeing of cellulose-containing yarn with indigo in a single operation is disclosed, in that the reduced indigo from an aqueous dye liquor containing reducing agents, alkali, and additionally a further dissolved alkali metal salt in a concentration of 200 to 350 g/l as the electrolyte, and whose pH value has been adjusted to 10.2 to 11.3, is applied to the yarn. The reduced indigo absorbed by the fibers is oxidized again to pigment while maintaining the high concentration of electrolyte, and the dye process is finished in the customary manner.