Electrochemical method and system for dyeing and highlighting hair
US6994733B2 · kind B2 · utility
6Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2004 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Sep 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S132/901
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for electrochemically dyeing, highlighting or tinting hair is provided which includes first applying to the hair an oxidative dye precursor mixture containing a primary intermediate having a standard Redox potential that is less than about 1V. This precursor mixture on the hair in then contacted with an electrode system that has sufficient voltage to electrochemically oxidize the primary intermediate to produce a colored dye through a coupling reaction. A system or kit for carrying out the method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.