Method for dyeing leather with water-soluble sulpho group-contai

Details Method for dyeing leather with water-soluble sulpho group-contai Method for dyeing leather with water-soluble sulpho group-contai

1986-01-30

1988-01-05

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Leather dyeing

D06P 332

Patent

active

047173904

ABSTRACT:
Tanned leather is penetration-dyed from aqueous medium with hydrospluble sulpho group-containing sulphur dyes in the presence of dye-substantive uptake assistants and may be used as a substrate for further coloration processes, mainly dyeings and printings, in particular with anionic or basic dyes; in a variation of the process for overdyeing, in particular of thin leathers, the penetration-dyeing may also be carried out in the absence of the dye-substantive uptake assistant.

REFERENCES:
patent: 2228369 (1941-01-01), Scholler
patent: 3273954 (1966-09-01), Wachsmann et al.
patent: 3334960 (1967-08-01), Abel
patent: 4273243 (1981-06-01), Lach et al.
Journal of the Society of Dyers and Colorists, No. 77 (1961) pp. 646-656.

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