Pulverulent composition for bleaching human keratin fibers

A method of preparing a ready-to-use composition for bleaching human keratin fibers, comprising:

• mixing, at the time of application, a pulverulent composition with an aqueous hydrogen peroxide composition having a hydrogen peroxide titre of not more than 40 volumes, the pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain;
• and
• at least one agent chosen from γ-butyrolactone, dimethyl isosorbide, diisopropyl isosorbide, and esters comprising (a) at least one monoalcohol residue chosen from saturated, linear and branched C3-C6 monoalcohol residues, and (b) at least one acid residue chosen from C2-C24 difunctional acid residues and C12-C24 monofunctional fatty acid residues, the at least one agent being present in an amount sufficient to reduce dust content, the sufficient amount being less than 10% by weight relative to the total weight of the composition.

A method of bleaching human keratin fibers, comprising:

• mixing, at the time of application, a pulverulent composition with an aqueous hydrogen peroxide composition having a titre of not more than 40 volumes to produce a bleaching composition, the pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain, and
• at least one agent chosen from γ-butyrolactone, dimethyl isosorbide, diisopropyl isosorbide, and esters comprising (a) at least one monoalcohol residue chosen from saturated, linear and branched C3-C6 monoalcohol residues, and (b) at least one acid residue chosen from C2-C24 difunctional acid residues and C12-C24 monofunctional fatty acid residues, the at least one agent being present in an amount sufficient to reduce dust content, the sufficient amount being less than 10% by weight relative to the total weight of the composition;
• applying the bleaching composition to the keratin fibers, and
• leaving the bleaching composition on the fibers for an exposure time sufficient to bleach the fibers.

A kit for bleaching human keratin fibers comprising at least two compartments, wherein:

• a first compartment comprises a pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain, and
• at least one agent chosen from γ-butyrolactone, dimethyl isosorbide, diisopropyl isosorbide, and esters comprising (a) at least one monoalcohol residue chosen from saturated, linear and branched C3-C6 monoalcohol residues, and (b) at least one acid residue chosen from C2-C24 difunctional acid residues and C12-C24 monofunctional fatty acid residues, the at least one agent being present in an amount sufficient to reduce dust content, the sufficient amount being less than 10% by weight relative to the total weight of the composition;
• and
• a second compartment comprises an aqueous hydrogen peroxide composition having a hydrogen peroxide titre of not more than 40 volumes.

A ready-to-use composition for bleaching human keratin fibers, comprising:

• a pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain;
• and
• at least one agent chosen from γ-butyrolactone, dimethyl isosorbide, diisopropyl isosorbide, and esters comprising (a) at least one monoalcohol residue chosen from saturated, linear and branched C3-C6 monoalcohol residues, and (b) at least one acid residue chosen from C2-C24 difunctional acid residues and C12-C24 monofunctional fatty acid residues, the at least one agent being present in an amount sufficient to reduce dust content, the sufficient amount being less than 10% by weight relative to the total weight of the composition;
• and
• an aqueous hydrogen peroxide composition having a hydrogen peroxide titre of not more than 40 volumes.