Color-developing composition, and cosmetic preparation, fragrance product and display article using the same

Abstract

The invention provides a color-developing composition without using a pigment or dye and capable of being colored sustainably and stably after mixing two liquid phases which are colorless before mixing. The composition consists of two discrete liquid phases, wherein the refractive index of each liquid phase is identical to each other at a point within the wavelength range from 400 nm to 800 nm, wherein a continuous layer and a dispersion layer are formed by mixing and dispersing said two phases whereby developing a color. Alternatively, the composition is a powder dispersion consisting of a liquid phase and a silica powder-containing solid phase, wherein said liquid phase has a refractive index n 1 and said silica has a refractive index n 2 , which satisfy Equation (1): | n 1 −n 2|<0.05  ( 1 ) whereby developing a color on the basis of the difference in the refractive index at the interface between the liquid phase and the solid phase. The present invention also provides a cosmetic preparation, a fragrance product and a display article using the composition.

1 . A color-developing composition consisting of a first liquid phase and a second liquid phase, wherein said first liquid phase has a refractive index (n 1 ) which is identical to a refractive index (n 2 ) of said second liquid phase at a point within the wavelength range from 400 nm to 800 nm, whereby a color is developed at the interface between said first liquid phase and said liquid phase in said color-developing composition when said first liquid phase and said second liquid phase are mixed and dispersed together.  
   
   
       2 . The color-developing composition according to  claim 1 , wherein the absolute refractive index (n 1 ) of said first liquid phase and the absolute refractive index (n 2 ) of said second liquid phase at the wavelength of sodium D ray are 1.3 or higher.  
   
   
       3 . The color-developing composition according to  claim 1 , wherein either said first liquid phase or said second liquid phase contains water and/or a lower alcohol.  
   
   
       4 . The color-developing composition according to  claim 1 , wherein either said first liquid phase or said second liquid phase contains a silicone oil.  
   
   
       5 . The color-developing composition according to  claim 1 , wherein said first liquid phase and/or said second liquid phase contain perfumes.  
   
   
       6 - 11 . (canceled)  
   
   
       12 . A cosmetic preparation employing a color-developing composition according to  claim 1 .  
   
   
       13 . A cosmetic preparation according to  claim 12 , wherein said cosmetic preparation is a skin care product, make-up product, fragrance product, skin or hair cleansing product or enamel removing product.  
   
   
       14 . A display article employing a color-developing composition according to  claim 1 .  
   
   
       15 . A fragrance product employing a color-developing composition according to  claim 5 .  
   
   
       16 . A method for using a color-developing composition according to  claim 1  as a cosmetic preparation.  
   
   
       17 . A method for using a color-developing composition according to  claim 1  as a display article.  
   
   
       18 . A method for using a color-developing composition according to  claim 5  as a fragrance product.  
   
   
       19 . A method for applying a color-developing composition according to  claim 1  to a cosmetic preparation comprising: 
 mixing and dispersing said first liquid phase and said second liquid phase in said cosmetic preparation.    
   
   
       20 . A method for applying a color-developing composition according to  claim 1  to a display article comprising: 
 mixing and dispersing said first liquid phase and said second liquid phase in said display article.