Dyeing method

Details Dyeing method Dyeing method

1980-03-12

1982-04-06

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing process utilizing electric, magnetic, or wave energy;...

D06P 520, G21K 508

Patent

active

043233619

ABSTRACT:
In dyeing keratinous fibres, such as wool, by impregnating the fibres with aqueous compositions containing dyes, followed by storage in the moist condition, a higher level of fixation, enabling heavier shades to be obtained with cheaper dyes, can be achieved by raising the temperature of the stored fibres by means of radio frequency heating. The storage temperature is preferably between 40.degree. and 80.degree. C., which usually requires about 0.05 kw hour/kg fibres. Acid, milling, chrome and premetallized dyes can be used, as well as reactive dyes and substantive optical brighteners. The fibres are cuttled into an insulated plastics material cart located between a pair of electrodes in an r.f. chamber. One electrode is fixed and the other is adjustable so that the r.f. load acting on the fibres may be set at a desired value.

REFERENCES:
patent: 2366347 (1945-01-01), Millson
patent: 3484179 (1969-12-01), Adams et al.
patent: 4104019 (1978-08-01), Smith
Dawson, T. L., Textile Month, Feb. 1972, pp. 47-48.

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