Oxidant preparation having optimized viscosity for treating keratin fibers

A method for hair color modification, comprising:

• mixing an oxidizing agent preparation that includes:
• (a) 0.01 to 25.0 wt. % of hydrogen peroxide,
• (b) 0.01 to 15.0 wt. % of one or more organic lipophilic compound(s) selected from the group consisting of plant and animal fats, oils and waxes, paraffin hydrocarbons, C10-C24 fatty alcohols, silicone oils and dialkyl ethers of formula (I),
• R1-O—R2 (I)
• in which
• R1 and R2 mutually independently denote an unbranched or branched C8-C24 alkyl group,
• (c) 0.01 to 2.00 wt. % of one or more organic thickeners selected from the group consisting of polysaccharides, and
• (d) at least one organic carbonate selected from the group consisting of the carbonates of formula (II) and formula (III),
• in which
• R3, R4 mutually independently denote an unbranched C1-C30 alkyl group, a branched C3-C30 alkyl group or a mono- or polyunsaturated C2-C30 allyl group,
• R5, R6 mutually independently denote hydrogen, an unbranched C1-C30 alkyl group, a branched C3-C30 alkyl group, a mono- or polyunsaturated C2-C30 alkyl group or a hydroxy-C1-C6-alkyl group,
• with the proviso that the oxidizing agent preparation
• does not include a polymer which is obtained by polymerization or copolymerization of acrylic acid,
• does not include a polymer which is obtained by polymerization or copolymerization of methacrylic acid,
• does not include a polymer which is obtained by polymerization or copolymerization of acrylic acid esters, and
• does not include a polymer which is obtained by polymerization or copolymerization of methacrylic acid esters,
• with an agent including an alkalizing agent and optionally additionally at least one oxidation dye precursor of the developer and/or coupler type and/or a substantive dye to form a homogenous mixture,
• applying the homogeneous mixture onto the hair and leaving the applied mixture on the hair for a period of 5 to 60 minutes, and
• rinsing the mixture out of the hair.