Dyeing leather with water-insoluble sulphur dyes

Details Dyeing leather with water-insoluble sulphur dyes Dyeing leather with water-insoluble sulphur dyes

D - Textiles, Paper

06

P

D06P 1/30 (2006.01) D06P 3/32 (2006.01)

Patent

CA 2061632

23233-261 ABSTRACT A process for dyeing leather by the exhaust method using a water-insoluble sulphur dye in dispersed form is disclosed. The process is carried out under the dyeing conditions which are customary for the known exhaust dyeing process involving water- soluble leather dyes. The sulphur dyes in dispersed form may be combined with a dispersion of an inorganic or organic pigment and/or with a water-soluble acid or direct dye. The process is suitable for all kinds of leather and is characterized by the deep penetration of colour and high colour strength combined with good fastness properties. The process is also free of some disadvantages of similar existing processes, such as low substan- tivity, high effluent pollution or high energy consumption.

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