| 摘要 |
<p>Tetrakisazo dyes of formula (I), as defined in Claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in Claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of leather in very intense dark shades.</p> |
