Pulverulent composition for bleaching human keratin fibers

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

• providing a pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one polymer chosen from nonionic and anionic amphiphilic polymers, wherein said at least one polymer comprises at least one fatty chain;
• and
• at least one polydecene of formula C10nH[(20n)+2] in which n ranges from 3 to 9, present in an amount by weight of less than 10% relative to the total weight of the composition;
• and
• mixing, at the time of application to said human keratin fibers, the pulverulent composition with an aqueous hydrogen peroxide composition having a hydrogen peroxide titre of not more than 40 volumes.

A method of bleaching human keratin fibers, comprising:

• providing a pulverulent composition comprising, in a medium that is suitable for bleaching:
• at least one peroxygenated salt;
• at least one polymer chosen from nonionic and anionic amphiphilic polymers, wherein said at least one polymer comprises at least one fatty chain;
• and
• at least one polydecene of formula C10nH[(20n)+2] in which n ranges from 3 to 9, present in an amount by weight of less than 10% relative to the total weight of the composition;
• mixing, at the time of application, the pulverulent composition with an aqueous hydrogen peroxide composition having a hydrogen peroxide titre of not more than 40 volumes to produce a bleaching composition;
• applying the bleaching composition to the keratin fibers;
• leaving the bleaching composition on the fibers for an exposure time;
• rinsing the fibers;
• and optionally, washing the rinsed fibers with shampoo, rinsing the washed fibers, and drying the rinsed fibers.

A multi-compartment device for bleaching human keratin fibers comprising at least two compartments, where:

• a first compartment comprises a pulverulent composition comprising:
• at least one peroxygenated salt;
• at least one polymer chosen from nonionic and anionic amphiphilic polymers, wherein said at least one polymer comprises at least one fatty chain;
• and
• at least one polydecene of formula C10nH[(20n)+2] in which n ranges from 3 to 9, present in an amount by weight of less than 10% relative to the total weight of the composition;
• and
• a second compartment comprises an aqueous hydrogen peroxide composition having a titre of not more than 40 volumes.