Reduction clearing of disperse dyes

Details Reduction clearing of disperse dyes Reduction clearing of disperse dyes

1979-08-02

1981-09-01

Schofer, Joesph L.

Bleaching and dyeing; fluid treatment and chemical modification

Multiple chemically diverse fibers or fibers with different...

Polyester fiber and cellulose fiber

8529, 8110, 8618, D06P 502, D06P 3872

Patent

active

042869617

ABSTRACT:
The present invention relates to an after-dyeing treatment process for synthetic/cellulosic fibre mixed substrates which have been dyed with at least one disperse and at least one reactive dye in which after fixation, the dyed or printed substrate is reductively treated at a neutral to alkaline pH with an aqueous solution containing reducing agent, whereby non-bound disperse dyestuff is decomposed such that it does not re-build up on the substrate whilst the fixed reactive dyestuff remains substantially unaffected.

REFERENCES:
patent: 4062642 (1977-12-01), Deucker, et al.
patent: 4066390 (1978-01-01), Christie et al.
Schnider, E. F., Amer. Dyestuff Reporter, May 13, 1963, pp. 52-59.

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