Aqueous compositions for darkening keratinous materials

Details Aqueous compositions for darkening keratinous materials Aqueous compositions for darkening keratinous materials

1981-03-02

1982-01-12

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

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

8405, 8604, 8636, D06P 314, D06P 330

Patent

active

043103294

ABSTRACT:
Aqueous composition for darkening keratinous material, particularly hair, comprise a mixture of a solution of a salt of thiosulphuric acid, preferably in an amount of 0.2-5.0% by weight as thiosulphate ion, preferably as the sodium thiosulphate or an amine such as triethanolamine thiosulphate; with a solution of a complex of bismuth with an amino-polyacetic acid such as nitrilotriacetic acid or ethylenediamine tetracetic acid, the bismuth preferably being present in an amount (measured as carbonate) of 0.1-5.0% by weight; in the presence of a water-soluble amine, preferably an a alkanolamine such as mono-, di- or triethanolamine in an amount to maintain the pH in the range 8 to 11; and of a di- or poly-hydroxy humectant, preferably glycerol or propylene glycol in an amount of 5-70% by weight.

REFERENCES:
patent: 3954393 (1976-05-01), Lapidus
patent: 4195972 (1980-04-01), Lapidus

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