abstract |
The present invention relates to one or more substituted para-aminophenols as oxidation substrates in a medium suitable for dyeing, and / or to 1,3-bis (β-hydroxyethyl) amino-2-methylbenzene and / or one or more acids thereof as coupling agents. (Iii) A composition for oxidative dyeing of keratin fibers, especially human keratin fibers, such as hair, containing an addition salt, and a dyeing method using the composition. |