Reactive dyestuff composition and their use

A dye composition comprising:

• (a) a mono azo dye of the following formula (I) present in an amount ranging from 1% to 99% by weight relative to total weight of the composition,
• wherein
• R is hydrogen, sulfo, C1-4 alkyl or C1-4 alkoxyl;
• R1 is —CH3or —COOH;
• K is phenyl or naphthyl ring having 0 to 3 substituent groups, said substituent groups are selected from halogen, C1-4 alkyl, C1-4 alkoxyl, nitro, amino, hydroxyl, carboxyl, phosphonic acid, sulfo and —SO2—Y;
• Y is —CH═CH2, —CH2CH2Cl or —CH2CH2OSO3H;
• m is 2;
• and
• (b) at least one azo dye selected from the group consisting of the following formula (II), (III) and (IV) present in an amount ranging from 1% to 99% by weight relative to total weight of the composition,
• wherein
• R is hydrogen, sulfo, C1-4 alkyl or C1-4 alkoxyl;
• R2 is hydrogen, C1-4 alkyl sulfo or C1-4 carboxylic acid;
• R3 is hydrogen or carboxyl;
• Y is —CH═CH2, —CH2CH2Cl or —CH2CH2OSO3H;
• (W)0˜3 is 0 to 3 the same or different groups selected from the group consisting of sulfo, C1-4 alkyl and C1-4 alkoxyl;
• (W′)0˜3 is 0 to 3 the same or different groups selected from the group consisting of sulfo, C1-4 alkyl and C1-4 alkoxyl;
• D is the following group
• wherein
• n is 1, 2 or 3;
• o is 1 or 2;
• and
• D1 and D2 are independently of one another the following group of formula (VI):
• wherein
• (R4)0˜3 is 0 to 3 the same or different groups selected from the group consisting of halogen, carboxyl, sulfo, C1-4 alkyl and C1-4 alkoxyl;
• Y1 is —CH═CH2, —CH2CH2Cl or —CH2CH2OSO3H.