Dyeing process and dye composition

Details Dyeing process and dye composition Dyeing process and dye composition

D - Textiles, Paper

06

P

D06P 1/12 (2006.01) C09B 67/00 (2006.01) D06P 1/22 (2006.01) D06P 1/30 (2006.01) D06P 3/60 (2006.01) D06P 3/82 (2006.01)

Patent

CA 2352433

A process for dyeing fibrous substrates which comprises the steps of providing a fibrous substrate; providing at least one optionally (pre)reduced sulphur dye; providing at least one reduction stable direct dye; and optionally providing at least one vat dye; and applying said reduction stable direct dye and said optionally (pre)reduced sulphur dye and optionally said vat dye to said fibrous substrate in the presence of a suitable reducing agent and then reoxidising.

La présente invention concerne un procédé permettant de teindre des substrats fibreux. A cet effet, on se procure un substrat fibreux, au moins une teinture soufrée éventuellement préalablement réduite, au moins une teinture directe stable en réduction et éventuellement au moins un colorant de cuve. En présence d'un réducteur approprié, on applique sur le substrat fibreux considéré cette teinture directe stable en réduction, la teinture soufrée éventuellement préalablement réduite, et éventuellement le colorant de cuve. On termine par une réoxydation.

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