Combinations of preservatives for hair dyes

A cosmetic product for changing the color of keratin fibers, in particular human hair, includes

• a coloring preparation (F) which is packaged in a reclosable container (C) for treating hair multiple times, wherein the coloring preparation (F) includes, in a cosmetic carrier,
• (a) at least one first preservative selected from the group consisting of potassium sulfite, potassium hydrogen sulfite, zinc pyrithione, benzoic acid, salicylic acid, sorbic acid, formic acid, propionic acid and the physiologically acceptable salts of the aforementioned acids, and
• (b) at least one second preservative selected from the group consisting of 2-phenoxy-ethanol, benzyl alcohol, 1-phenoxypropan-2-ol, isopropanol and ethanol, and
• (c) at least one substantive dye, the dye selected from a group consisting of anionic, cationic and nonionic substantive dyes,
• wherein a weight ratio (a)/(b) of all the preservatives (a) included in the coloring preparation (F) to all the preservatives (b) included in the coloring preparation (F), is 10.0 to 0.1, and
• wherein the coloring preparation (F) further includes at least one preservative selected from the group consisting of
• 2-hydroxydiphenyl, dehydroacetic acid, dibromohexamidine, 10-undecylenic acid, hexetidinum, triclocarban, triclosanum, 1-(4-chlorophenoxy)-1-(imidazol-1-yl)-3,3-dimethyl-2-butanone, 1,3-bis-(hydroxymethyl)-5,5-dimethyl-2,4-imidazolidinedione, 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone, 3-methyl-4-(1-methylethyl)phenol, 5-chloro-2-methyl-3(2H)-isothiazolone, 2-benzyl-4-chlorophenol, 2-chloroacetamide, chlorhexidine, 4,4-dimethyl-1,3-oxazolidine, 1-phenoxypropan-2-ol, hexamidinum, 5-ethyl-1-aza-3,7-dioxabicyclo-[3.3.0]-octane, chlorphenesin, sodium hydroxy-methyl aminoacetate, benzyl hemiformal, 3-iodo-2-propynyl butylcarbamate, methylisothiazolinone and Ethyl Lauroyl Arginate, and
• wherein the cosmetic product comprises no further container containing hydrogen peroxide.