Hair dyeing process and compositons package
US5173085A · kind A · utility
20Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Jan 29, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/492
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A hair dyeing process which comprises of steps of contacting the hair to be dyed with an aqueous solution of a metal salt that promotes melanogenses in air. Before or after the aforementioned step contacting the hair with a solution of 5,6-dihydroxyindole, rinsing the hair between the two contacting steps, maintaining the contact with the second-used solution until a desired darker color is obtained, rinsing or shampooing the hair, then contacting the hair with a solution of hydrogen peroxide until the desired color shade is obtained, and then again rinsing the hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.