| 摘要 |
<p>The invention concerns agents for the dyeing of keratin-containing fibres, in particular human hair, said agents containing 2,4,5,6-tetraaminopyrimidines, the usual coupling compounds and selected direct-dyeing agents. Particularly suitable direct-dyeing agents are 6-chloro-4-nitro-2-aminophenol, 5-chloro-4-(2-hydroxyethyl)amino-2-nitroaniline, 1,4-bis-[(2,3-dihydroxypropyl)amino]-5-chloro-2-nitrobenzene and 1-(2-hydroxyethyl)amino-4-methyl-2-nitrobenzene.</p> |
