Method for gradual coloring of hair to a light brown shade and preparations for use therein
US4297098A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1976 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Aug 26, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Living human hair is progressively colored to the desired light brown shade by repeated applications of a preparation containing a low concentration of a mixture of oxidative dye components, namely, 2 to 3 components selected from p-phenylenediamine (or p-toluenediamine), pyrogallol, and m-aminophenol. To obtain a gradual, true color development, it is important to employ the dye components in certain relative proportions. In the use of the preparation, no oxidizing agent is added, and the color development reaction is obtained by contact of the dye mixture with atmospheric oxygen. The preparation is preferably in the form of an aqueous gel also containing hair grooming or conditioning agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.