Foil Applicator

Abstract

Foil-type applicator for the selective lightening of keratin fibers, particularly human hair, and use of the applicators for producing targeted lightening effects on the hair.

We claim: 
     
         1 . Foil applicator for selective lightening of keratinic fibers comprising:
 a sheet-shaped substrate, and   a cosmetic hair-bleaching preparation applied onto the substrate,   wherein the hair-bleaching preparation is anhydrous and comprises at least one solid peroxodisulfate salt and at least one solid addition product of hydrogen peroxide with organic or inorganic compounds.   
     
     
         2 . Foil applicator according to  claim 1 , wherein the sheet-shaped substrate has a thickness of 5 μm to 10 mm. 
     
     
         3 . Foil applicator according to  claim 1 , wherein the sheet-shaped substrate comprises at least one layer made of aluminum foil. 
     
     
         4 . Foil applicator according to  claim 1 , wherein the peroxodisulfate salt is chosen from ammonium peroxodisulfate, potassium peroxodisulfate, and sodium peroxodisulfate. 
     
     
         5 . Foil applicator according to  claim 1 , wherein the peroxodisulfate salt is a mixture of at least ammonium peroxodisulfate and at least potassium peroxodisulfate and/or sodium peroxodisulfate. 
     
     
         6 . Foil applicator according to  claim 1 , wherein the solid addition product of hydrogen peroxide with organic or inorganic compounds is chosen from addition products with urea, melamine, and polyvinylpyrrolidinone. 
     
     
         7 . Foil applicator according to  claim 1 , wherein the cosmetic hair-bleaching preparation comprises at least 10 wt % of the total weight of the foil. 
     
     
         8 . Method for lightening keratinic fibers comprising:
 laying at least one bundle of keratinic fibers onto a foil applicator according to  claim 1 ,   wrapping the keratinic fibers in the foil,   leaving the keratinic fiber in the applicator foil for a contact time,   removing the foil, and   rinsing the keratinic fibers out.   
     
     
         9 . Method according to  claim 8  comprising isolating a strand of dry human hair as a bundle of keratinic fibers from dry hair, thoroughly moistening the strand with water on the foil applicator, and immediately thereafter wrapping the strand in the foil. 
     
     
         10 . Method according to  claim 8 , wherein the contact time is from 1 to 45 minutes, and after the contact time, removing the foil from the strand and rinsing the keratinic fibers out.