Mixtures of Reactive Dyes and Their Use

A process for the printing of a substrate comprising spraying individual droplets of an aqueous ink onto the substrate from a nozzle in a controlled manner wherein the aqueous ink comprises a dye mixture comprising at least one dye of formula

• and at least one dye from the group of formulae
• wherein
• (R1)b denotes b identical or different substituents from the group C1-C4, alkyl, C1-C4, alkoxy, sulfo and halogen,
• R2, R3, R4 and R5 are each independently of the others hydrogen, C1-C4 alkyl, C1-C4 alkoxy, sulfo or halogen,
• one of the radicals Q1 and Q2 is amino and the other of the radicals Q1 and Q2 is hydroxy,
• X1 is halogen,
• Y1 and Y3 are each independently of the others a fibre-reactive radical of formula
• —SO2—Z (5a),
• —NH—CO—(CH2)m—SO2—Z (5b),
• —CONH—(CH2)n—SO2—Z (5c),
• —NH—CO—CH(Hal)-CH2-Hal (5d),
• —NH—CO—C(Hal)=CH2 (5e) or
• wherein
• X2 is halogen,
• T2 independently has the definition of X2, is a non-fibre-reactive substituent or is a fibre-reactive radical of formula
• —NH—(CH2)2-3—SO2—Z (6a),
• —NH—(CH2)2-3—O—(CH2)2-3—SO2—Z (6b),
• (R6)0-2 denotes from 0 to 2 identical or different substituents from the group halogen, C1-C4 alkyl, C1-C4 alkoxy and sulfo,
• Z is vinyl or a —CH2—CH2-U radical and U is a group that is removable under alkaline conditions,
• Q is a —CH(Hal)-CH2-Hal or —C(Hal)=CH2 group,
• m and n are each independently of the other the number 2, 3 or 4 and
• Hal is halogen,
• T1 is a fibre-reactive radical of the above formula (6b), (6c), (6d) or (6e) and
• b and k are each independently of the other the number 0, 1 or 2.