Cosmetic kit and its use as a make-up product

Abstract

A cosmetic kit includes a skin staining composition of (i) a monovalent salt of alginic acid, a water-soluble colorant, and water and (ii) an activating composition of water and a cosmetically acceptable salt of calcium or magnesium. Also disclosed is a method for cosmetically treating or making up the human skin by using the cosmetic kit useful in making up lips, eyelids and eyebrows.

1 . A cosmetic kit, comprising:
 (i) a skin staining composition comprising a monovalent salt of alginic acid, a water-soluble colorant, and water, wherein the monovalent salt of alginic acid is in an amount up to 10 wt %, based on the weight of composition (i); and   (ii) an activating composition comprising water, and a cosmetically acceptable salt of calcium or magnesium.   
     
     
         2 . The cosmetic kit of  claim 1 , wherein the monovalent salt of alginic acid of composition (i) is sodium alginate, potassium alginate, ammonium alginate, or a mixture thereof. 
     
     
         3 . The cosmetic kit of  claim 2 , wherein the monovalent salt of alginic acid is in an amount of 0.1-5 wt %, based on the weight of composition (i), preferably in an amount of 2-3 wt %. 
     
     
         4 . The cosmetic kit of  claim 3 , wherein the water-soluble colorant is in an amount up to 3 wt %, based on the weight of composition (i), preferably in an amount of 0.01-2 wt %. 
     
     
         5 . The cosmetic kit of  claim 4 , wherein the cosmetically acceptable salt of calcium or magnesium of composition (ii) is calcium chloride, calcium citrate, calcium acetate, calcium phosphate, dicalcium phosphate, magnesium chloride, magnesium citrate, magnesium lactate, magnesium sulphate or a mixture thereof. 
     
     
         6 . The cosmetic kit of  claim 5 , wherein the cosmetically acceptable salt of calcium or magnesium is in an amount up to 70 wt %, based on the weight of composition (ii), preferably in an amount of 2-50 wt %. 
     
     
         7 . The cosmetic kit of  claim 1 , wherein the cosmetic kit is used as a makeup product for the lips, eyelids, eyebrows, or combinations thereof. 
     
     
         8 . The cosmetic kit of  claim 1 , wherein the cosmetic kit comprises a makeup product having a first container containing composition (i) and a second container containing composition (ii). 
     
     
         9 . The cosmetic kit, comprising:
 (i) a skin staining composition comprising 2-3 wt % of a monovalent salt of alginic acid, 0.01-2 wt % of a water-soluble colorant, based on the weight of composition (i), and water; and   (ii) an activating composition comprising water, and 2-50 wt % a cosmetically acceptable salt of calcium or magnesium, based on the weight of composition (ii).   
     
     
         10 . The cosmetic kit of  claim 9 , wherein:
 (i) the skin staining composition comprises 2-3 wt % of a monovalent salt of alginic acid, 0.1-0.3 wt % of a water-soluble colorant, based on the weight of composition (i), and water;   (ii) the activating composition comprises water, and 2-20 wt % a cosmetically acceptable salt of calcium or magnesium, based on the weight of composition (ii);   wherein the monovalent salt of alginic acid of composition (i) is sodium alginate, potassium alginate, ammonium alginate, or a mixture thereof; and   wherein said cosmetically acceptable salt of calcium or magnesium is calcium chloride, calcium citrate, calcium acetate, calcium phosphate, dicalcium phosphate, magnesium chloride, magnesium citrate, magnesium lactate, magnesium sulphate or a mixture thereof.   
     
     
         11 . The cosmetic kit of  claim 9 , wherein the cosmetic kit is used as a makeup product for the lips, eyelids, eyebrows, or combinations thereof. 
     
     
         12 . The cosmetic kit of  claim 9 , wherein the cosmetic kit comprises a makeup product having a first container containing composition (i) and a second container containing composition (ii). 
     
     
         13 . A cosmetic method for making up human skin, comprising:
 a. providing a cosmetic kit having (i) a skin staining composition comprising a monovalent salt of alginic acid, a water-soluble colorant, and water, wherein the monovalent salt of alginic acid is in an amount up to 10 wt %, based on the weight of composition (i), and (ii) an activating composition comprising water, and a cosmetically acceptable salt of calcium or magnesium.   b. applying the skin staining composition (i) on the skin area to be stained;   c. applying the activating composition (ii) on the composition (i), thereby forming a film; and   d. removing the film by peeling it off from the stained skin.   
     
     
         14 . The method of  claim 13 , wherein the monovalent salt of alginic acid of composition (i) is sodium alginate, potassium alginate, ammonium alginate, or a mixture thereof. 
     
     
         15 . The method of  claim 14 , wherein the monovalent salt of alginic acid is in an amount of 0.1-5 wt %, based on the weight of composition (i), preferably in an amount of 2-3 wt %. 
     
     
         16 . The method of  claim 15 , wherein the water-soluble colorant is in an amount up to 3 wt %, based on the weight of composition (i), preferably in an amount of 0.01-2 wt %. 
     
     
         17 . The method of  claim 16 , wherein the cosmetically acceptable salt of calcium or magnesium of composition (ii) is calcium chloride, calcium citrate, calcium acetate, calcium phosphate, dicalcium phosphate, magnesium chloride, magnesium citrate, magnesium lactate, magnesium sulphate or a mixture thereof. 
     
     
         18 . The method of  claim 17 , wherein the cosmetically acceptable salt of calcium or magnesium is in an amount up to 70 wt %, based on the weight of composition (ii), preferably in an amount of 2-50 wt %. 
     
     
         19 . The method of  claim 13 , wherein the method is for making up the lips, eyelids, eyebrows, or combinations thereof.