Hair waving and straightening method
US4296764A · kind A · utility
5Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Dec 26, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/23
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for the waving or straightening of hair by treating with an alkaline bisulphite and or sulfite preparation followed by neutralizing with hydrogen peroxide is improved by using an aqueous neutralizing solution in which the hydrogen peroxide is present in a concentration of from 0.65 to 3.4% by weight and proportional to the concentration by weight of available sulfur dioxide in the waving/straightening solution used prior to neutralization. The process avoids certain disadvantages associated with the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.