Liquid preparations of reactive dyestuffs

A liquid aqueous dyeing preparation of a reactive dyestuff which contains from 15 to 30% by weight of a dyestuff, which in the form of its free acid corresponds to the formula ##STR29## or the formula ##STR30## in which A is a benzene or naphthalene nucleus which may contain 1, 2 or 3 substituents selected from the group consisting of fluorine, chlorine, bromine, lower alkyl, lower alkoxy, trifluoromethyl, acetylamino, benzoylamino, chloroacetylamino, methylbenzoylamino, chlorobenzoylamino, carboxy, lower alkylsulfonyl, lower alkylsulfonylamino, phenylsulfonylamino, carbonamide, N-alkyl- and N-phenyl-substituted carbonamide, sulfonamide, N-alkyl- and N-phenyl-substituted sulfonamide,

• B is a naphthalene nucleus which may be substituted by one or more groups selected from the group consisting of acetylamino, chloro-acetylamino, benzoylamino, carboxy, carbonamide, sulfonamide, lower alkyl-sulfonylamino, phenylsulfonylamino, lower alkylsulfonyl, phenylsulfonyl, hydroxy, amino, lower alkylamino and phenylamino in ortho position to one or to both azo groups,
• D has the same meaning as B or is a pyrazol-4-yl-radical which is substituted in 3-position by a methyl, carboxy, carbonamide or carboxylic acid alkyl ester group having from 2 to 5 carbon atoms, and which carries in 5-position a hydroxy or an amino group, and which contains in 1-position a bound phenyl radical or naphthyl radical, which may be substituted by 1, 2 or 3 substituents selected from the group consisting of acetylamino, benzoylamino, lower alkyl, lower alkoxy, carboxy, carbonamide, sulfonamide, nitro, chlorine and bromine and in which the sulfo groups and the reactive radical(s) Z stand at the aromatic radicals of A, B or D, m is 2, 3, 4, 5 or 6, and n is 1 or 2, or of the copper, chromium or cobalt complex dyestuffs of a dyestuff which corresponds, in its metal-free form, to one of the above-mentioned formulas, in which A, B and C have the meanings specified above, and wherein the carbocyclic aromatic nuclei of the radicals A, B or D contain the radical of a hydroxy, amino or a carboxy group, to which the metal atom is linked, or of an anthraquinone or trisazo dyestuff or of a copper phthalocyanine dyestuff of the formula
• (HO.sub.3 S).sub.m -F-Z.sub.n,
• wherein F is the dyestuff radical of an anthraquinone or a trisazo or a copper phthalocyanine dyestuff, and wherein Z is a fiber-reactive group selected from the group consisting of vinylsulfonyl, .beta.-thiosulfato-ethylsulfonyl, .beta.-phosphatoethylsulfonyl, .beta.-chloro-ethylsulfonyl, .beta.-sulfato-ethylsulfonyl, .beta.-sulfato-ethylsulfonyl-N-(alkyl 1-4 C)-amido and vinylsulfonyl-N- (alkyl 1-4 C)-amido, m is 2, 3, 4, 5 or 6, and n is 1 or 2,
• and which dyeing preparation contains from 1 to 5% by weight of a buffer substance that does not show any chemical reaction with the reactive group Z, and which is selected from the group consisting of sodium acetate, potassium acetate, sodium oxalate, potassium oxalate, acid sodium and potassium salts of phosphoric acid and secondary and tertiary sodium and potassium salts of phosphoric acid and sodium borate, and has a pH value in the range of from 3 to 7.