Bleaching foils

Abstract

Foil applicators for selective lightening of keratinic fibers and methods for selective lightening of keratinic fibers are provided. In an embodiment, a foil applicator contains a first layer comprising a leaf-like substrate and a second layer comprising a bleaching preparation containing a solid peroxodisulfate salt applied to the leaf-like substrate. The bleaching preparation is embedded in a nonwoven supporting material.

What is claimed is: 
     
         1 . A foil applicator for selective lightening of keratinic fibers, the foil applicator comprising:
 a first layer comprising a leaf-like substrate; and   a second layer comprising a bleaching preparation containing a solid peroxodisulfate salt applied to the leaf-like substrate,   
       wherein the bleaching preparation is embedded in a nonwoven supporting material. 
     
     
         2 . The foil applicator according to  claim 1 , wherein the leaf-like substrate is an aluminum foil. 
     
     
         3 . The foil applicator according to one of  claim 1 , wherein the second layer is attached by gluing and/or welding the nonwoven supporting material to the leaf-like substrate. 
     
     
         4 . The foil applicator according to  claim 1 , wherein the solid peroxodisulfate salt is chosen from ammonium peroxodisulfate, potassium peroxodisulfate and sodium peroxodisulfate. 
     
     
         5 . The foil applicator according to  claim 1 , wherein the bleaching preparation additionally contains silica, oligomers or polymers thereof, and/or one of alkali or alkaline-earth metal salts thereof. 
     
     
         6 . The foil applicator according to  claim 1 , wherein the bleaching preparation has a film thickness of from about 5 μm to about 200 μm. 
     
     
         7 . The foil applicator according to  claim 6 , wherein the bleaching preparation has the film thickness of from about 10 μm to about 150 μm. 
     
     
         8 . The foil applicator according to  claim 7 , wherein the bleaching preparation has the film thickness of from about 20 μm to about 100 μm. 
     
     
         9 . The foil applicator according to  claim 1 , wherein the foil applicator additionally comprises:
 a water-permeable barrier layer applied to the second layer; and   a solid oxidizing agent preparation containing as an oxidizing agent a solid addition product of hydrogen peroxide with organic or inorganic compounds, wherein the solid oxidizing agent preparation is applied to the water-permeable barrier layer.   
     
     
         10 . The foil applicator according to  claim 9 , wherein the foil applicator comprises as an additional layer a peelable, water-impermeable foil by means of which an uncovered surface of the bleaching preparation or of the solid oxidizing agent preparation that is exposed to air is completely covered. 
     
     
         11 . A method for lightening keratinic fibers, wherein the method comprises the steps of:
 providing a foil applicator having a leaf-like substrate and a bleaching preparation containing a solid peroxodisulfate salt applied to the leaf-like substrate, wherein the bleaching preparation is embedded in a nonwoven supporting material;   treating the foil applicator with an oxidizing agent preparation containing hydrogen peroxide in a cosmetic carrier;   immediately thereafter, laying a bundle of keratinic fibers on the foil applicator and wrapping the bundle in the foil applicator;   leaving the bundle of keratinic fibers in the foil applicator for a contact period of about 10 to about 60 minutes;   removing the foil applicator; and   rinsing the bundle of keratinic fibers.   
     
     
         12 . A method for lightening keratinic fibers, wherein the method comprises the steps of:
 providing a multilayer foil applicator having;
 a first layer comprising a leaf-like substrate; 
 a second layer comprising a bleaching preparation containing a solid peroxodisulfate salt applied to the leaf-like substrate, wherein the bleaching preparation is embedded in a nonwoven supporting material; 
 a water-permeable barrier layer applied to the second layer; and 
 a solid oxidizing agent preparation containing as an oxidizing agent a solid addition product of hydrogen peroxide with organic or inorganic compounds, wherein the solid oxidizing agent preparation is applied to the water-permeable barrier layer; 
   treating the multilayer foil applicator with water on a side with the solid oxidizing agent preparation;   immediately thereafter, laying a bundle of keratinic fibers on the multilayer foil applicator and wrapping the bundle in the multilayer foil applicator;   leaving the bundle of keratinic fibers in the multilayer foil applicator for a contact period of about 10 to about 60 minutes;   removing the multilayer foil applicator from the bundle of keratinic fibers; and   rinsing the bundle of keratinic fibers.