Method for dyeing keratinous fibers using 4-hydroxyindole at acid pH and composition used
US5391206A · kind A · utility
20Cited by
1References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Apr 12, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Method for dyeing keratinous fibres, in particular human keratinous fibres such as hair, characterized in that a composition containing, in a medium appropriate for dyeing: PA1 at least the coupler 4-hydroxyindole, as well as the salts of this compound; PA1 at least one oxidation dye precursor; and PA1 at least one oxidising agent; is applied to said fibres, the pH of the composition applied to the fibres being less than 7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.