Method for dyeing keratin fibres with oxidation dye precursors and direct powder dyes
US6190421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for dyeing keratin fibers, particularly human keratin fibers, and more particularly hair. When the method is used, an extemporaneous mixture is applied on the fibers of a composition (A) containing one or more oxidation dye precursors and optionally one or more couplers, of a composition (B), in powder form, containing one or more direct dyes, preferably cationic, optionally dispersed in an organic pulverulent excipient and/or a mineral pulverulent excipient, and a composition (C) containing one or more oxidizing agents. The invention also features a ready-to-use composition of three components (A), (B), and (C) stored separately and mixed at the time of use to be applied on keratin fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.