Novel dyeing system
 Substituted 3-aryl amino-indoline-2-ones, produced by the reaction of certain isatins and amines are among a group of compounds useful as hair colorants. The hair itself appears to function as a dye-formation promoter, so that no oxidative reagents are needed. 
Clairol Incorporated
A A
A61Q A61K
inventional inventional
Thomas M. James S.
Schultz Anderson