| 摘要 |
PROBLEM TO BE SOLVED: To obtain a blue dye mixture useful for dyeing hydroxyl and/or carboxyamido-contg. textile materials by including specific two kinds of copper complex formazan dyes. SOLUTION: This blue dye mixture is obtained by including (A) a copper complex formazan dye of formula I (R1 is H, chloro, methoxy, methyl or sulfo; Y1 is vinyl or ethyl substituted at itsβ-position by a substituent capable of forming a vinyl group through being eliminated by the action of an alkali; M is H or an alkali metal) and (B) a 2nd copper complex formazan dye of formula II (R2 is H, chloro, methoxy, methyl or sulfo; Y2 is vinyl or ethyl substituted at itsβ-position by a substituent capable of forming a vinyl group through being eliminated by the action of an alkali; M is H or an alkali metal) in the weight ratio A/B of pref. (90:10) to (10:90), more pref. (75:25) to (25:75).
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