| 摘要 |
A combination of three components, at least one yellow dyestuff of formula Ia, optionally together with at least one yellow to orange dyestuff of formulae Ib to Ie, together with at least one dyestuff of formulae II and III which dyestuffs are as defined in the specification, gives a well-balanced trichromatic mixture, which is most suitable for the trichromatic dyeing or printing nitrogen containing organic substrates, especially natural or synthetic polyamides, using conventional dyeing or printing processes.
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