A dye mixture comprising at least one dye of formula (formula) and at least one dye of formula (formula), wherein R.sub.1 is hydrogen or C.sub.1-C.sub.4alkyl, R.sub.2 is hydrogen or C.sub.1-C.sub.4alkyl, C.sub.1-C.sub.4alkoxy or sulfo, Q.sub.1 is a fibre-reactive radical of formula —(CH.sub.2).sub.2-3—SO.sub.2—Y.sub.2 (3a) or —(CH.sub.2).sub.2-3—O—(CH.sub.2).sub.2-3—SO.sub.2—Y.sub.3 (3b), Q.sub.2 has the meaning of Q.sub.1, or is hydrogen or C.sub.1-C.sub.4alkyl, X.sub.1 and X.sub.2 are each independently of the other halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl, Y.sub.1, Y.sub.2 and Y.sub.3 are each independently of the others vinyl or a radical —CH.sub.2—CH.sub.2—U and U is a group removable under alkaline conditions, Z.sub.1 and Z.sub.2 are each independently of the other —S0.sub.2-Y, wherein Y is vinyl or a radical —CH.sub.2—CH.sub.2—U and U is a group removable under alkaline conditions, M is hydrogen, an alkali metal or one equivalent of an alkaline earth metal, k and n are each independently of the other the number 0, 1 or 2, I and q are each independently of the other the number 0 or 1, m is the number 0 or 1, and wherein the diazo component of the dye of formula (1) and the diazo component of the dye of formula (2) each independently of the other are a benzene radical or a naphthyl radical, are suitable especially for the dyeing or printing of cellulosic fibre materials, exhibit a good build-up, a good fixation rate and good washing off properties of the unfixed dyes, and good all-round fastness properties.

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The invention relates to mixtures of fiber-reactive Triphendioxazine dyes with other fiber-reactive azo dyes and their use for the dyeing of hydroxyl- and especially carboxamide-containing material in blue and navy shades.

The present invention relates to novel bisazo dyes, a process for their preparation and their use for dyeing and/or printing substrates.

The present invention relates to novel bisazo dyes, a process for their preparation and their use for dyeing and/or printing substrates.

The present invention relates to novel bisazo dyes, a process for their preparation and their use for dyeing and/or printing substrates.

A process for the simultaneous tanning and dyeing of collagen containing fibrous material, wherein the said material is treated with a liquor containing at least one reactive dyestuff selected from the group of formula (1) and (2) ##STR00001## wherein A.sub.1, A.sub.2 and A.sub.3 are each independently of the others the radical of a monoazo, polyazo, metal-complexed azo, anthraquinone, phthalocyanine, formazan or dioxazine chromophore having at least one sulfo group, B is an organic bridge member, Q.sub.1, Q.sub.2, Q.sub.3 and Q.sub.4 are each independently of the others hydrogen or unsubstituted or substituted C.sub.1-C.sub.4alkyl, G.sub.1 and G.sub.2 are halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl, (Z.sub.1).sub.2-3 is 2 to 3 identical or different fiber reactive radicals, Z.sub.2 and Z.sub.3 are each independently of the other identical or different fiber reactive radicals, and b is the number 0 or 1, by combining two steps of leather production, tanning and dyeing, into a single step, thus, preserving resources and reducing the environmental impact.

A dye mixture comprising at least one dye of formula (formula) and at least one dye of formula (formula), wherein R.sub.1 is hydrogen or C.sub.1-C.sub.4alkyl, R.sub.2 is hydrogen or C.sub.1-C.sub.4alkyl, C.sub.1-C.sub.4alkoxy or sulfo, Q.sub.1 is a fibre-reactive radical of formula (CH.sub.2).sub.2- 3SO.sub.2Y.sub.2 (3a) or (CH.sub.2).sub.2-3O(CH.sub.2).sub.2-3SO.sub.2Y.sub.3 (3b), Q.sub.2 has the meaning of Q.sub.1, or is hydrogen or C.sub.1-C.sub.4alkyl, X.sub.1 and X.sub.2 are each independently of the other halogen, 3-carboxypyridin-1-yl or 3-carbamoylpyridin-1-yl, Y.sub.1, Y.sub.2 and Y.sub.3 are each independently of the others vinyl or a radical CH.sub.2CH.sub.2U and U is a group removable under alkaline conditions, Z.sub.1 and Z.sub.2 are each independently of the other S0.sub.2-Y, wherein Y is vinyl or a radical CH.sub.2CH.sub.2U and U is a group removable under alkaline conditions, M is hydrogen, an alkali metal or one equivalent of an alkaline earth metal, k and n are each independently of the other the number 0, 1 or 2, I and q are each independently of the other the number 0 or 1, m is the number 0 or 1, and wherein the diazo component of the dye of formula (1) and the diazo component of the dye of formula (2) each independently of the other are a benzene radical or a naphthyl radical, are suitable especially for the dyeing or printing of cellulosic fibre materials, exhibit a good build-up, a good fixation rate and good washing off properties of the unfixed dyes, and good all-round fastness properties. ##STR00001##