Method for permanently reshaping keratin fibers comprising applying a poorly concentrated reducing composition and intermediate drying

Abstract

The present disclosure relates to a method for permanently reshaping the keratin fibers, for example for permanently reshaping the hair, comprising: mechanically setting the keratin fibers under tension by winding the same around at least one mechanical tensioning device, said at least one device being flexible and closable upon itself, so as to form a curl, applying onto the keratin fibers at least one reducing composition, so as to reduce the keratin disulfide bonds, an optional rinsing, drying the keratin fibers, and applying at least one oxidizin composition, to reform said bonds.

1 . A method for permanently reshaping the keratin fibers, comprising:
 mechanically setting the keratin fibers under tension by winding the keratin fibers around at least one mechanical tensioning device so as to form a curl, wherein said device is flexible and closable upon itself;   applying onto the keratin fibers at least one reducing composition, so as to reduce the keratin disulfide bonds,   optionally rinsing the keratin fibers,   drying the keratin fibers, and   applying at least one oxidizing composition, to reform said bonds.   
   
   
       2 . A method according to  claim 1 , wherein the at least one mechanical tensioning device is at least one curler or at least one curlpaper. 
   
   
       3 . A method according to  claim 2 , wherein the at least one curler is a tulip-type curler. 
   
   
       4 . A method according to  claim 1 , wherein the at least one reducing composition comprises, in a cosmetically acceptable medium, at least one reducing agent chosen from sulfites, bisulfites, thiols and phosphines. 
   
   
       5 . A method according to  claim 4 , wherein the at least one reducing agent is chosen from L-cysteine, D-cysteine, L,D-cysteine, and the salts thereof; thiolactic acid, and the salts and esters thereof; and thioglycolic acid, and the salts and esters thereof. 
   
   
       6 . A method according to  claim 5 , wherein the at least one reducing agent is present in an amount ranging from 0.5 to 10% by weight, relative to the total weight of the reducing composition. 
   
   
       7 . A method according to  claim 1 , wherein the at least one reducing composition is left to stand for a time period ranging from 1 to 50 minutes. 
   
   
       8 . A method according to  claim 1 , wherein the pH value of the at least one reducing composition ranges from 7.5 to 11. 
   
   
       9 . A method according to  claim 1 , wherein the at least one oxidizing composition comprises at least one oxidizing agent chosen from hydrogen peroxide, carbamide peroxide, alkaline bromates, polythionates, persalts, percarbonates and persulfates. 
   
   
       10 . A method according to  claim 9 , wherein the at least one oxidizing agent is present in an amount ranging from 0.1 to 10% by weight relative to the total weight of the oxidizing composition. 
   
   
       11 . A method according to  claim 1 , wherein the at least one oxidizing composition is left to stand for a time period ranging from 2 to 30 minutes. 
   
   
       12 . A method according to  claim 1 , wherein the pH value of the at least one oxidizing composition ranges from 1.5 to 4.5. 
   
   
       13 . A method according to  claim 1 , further comprising, following the application of the at least one reducing composition and/or following the application of the at least one oxidizing composition, with rinsing the keratin fibers with water. 
   
   
       14 . A method according to  claim 1 , wherein the application of the at least one reducing composition is effected under heating or is immediately followed with a heating operation. 
   
   
       15 . A method according to  claim 1 , wherein the at least one reducing composition and/or the at least one oxidizing composition are, independently of each other, in a form chosen from a lotion, thickened or not thickened; a cream; a gel; and a foam. 
   
   
       16 . A method according to  claim 1 , wherein the mechanically setting the keratin fibers under tension occurs after applying at least one hair-care composition which comprises at least one cationic polymer and/or at least one silicone. 
   
   
       17 . A method according to  claim 16 , wherein the application of the at least one hair-care composition is followed by rinsing. 
   
   
       18 . A multi-compartment kit, comprising:
 at least one mechanical tensioning device, wherein said at least one device is flexible and closable upon itself,   a first compartment comprising at least one cosmetic composition comprising at least one reducing agent, and   a second compartment comprising at least one cosmetic composition, which comprises at least one oxidizing agent.