Method of creating a cosmetic spray

Abstract

A method of spraying a liquid cosmetic composition onto the surface of the human body comprising: (i) mechanically pressurising a free-flowing liquid cosmetic composition to a pressure of from 1.0 to less than 5.0 MPa; (ii) passing said composition through a swirl chamber, and (iii) expelling said composition through a 100 to 200 micron outlet nozzle onto the surface of the human body.

1 . A method of spraying a liquid cosmetic composition onto the surface of the human body comprising: 
 (i) mechanically pressurising a free-flowing liquid cosmetic composition to a pressure of from 1.0 to less than 5.0 MPa;    (ii) passing said composition through a swirl chamber, and    (iii) expelling said composition through a 100 to 200 micron outlet nozzle.    
   
   
       2 . A method according to  claim 1 , wherein the swirl chamber has one or more radial inlet holes or slots that are tangentially disposed to the cross-section of the swirl chamber.  
   
   
       3 . A method according to  claim 2 , wherein the total cross-sectional area of the inlet(s) is greater than that of the outlet nozzle.  
   
   
       4 . A method according to  claim 3 , wherein the inlet:outlet area ratio of the swirl chamber is from 2.5:1 to 3:1.  
   
   
       5 . A method according to  claim 2 , wherein the swirl chamber has from two to four inlet holes or slots.  
   
   
       6 . A method according to  claim 1 , wherein the free-flowing liquid cosmetic composition is mechanically pressurised to a pressure of from 1.5 to 3.5 MPa.  
   
   
       7 . A product comprising a free-flowing liquid cosmetic composition and a hand-held spraying device suitable for spraying the same onto the human body, said device comprising a pre-atomisation chamber for the cosmetic composition, a means for subjecting the cosmetic composition to a pressure of from 1.0 to less than 5.0 MPa, a transfer conduit for the cosmetic composition leading from the pre-atomisation chamber to a swirl chamber, the swirl chamber having a 100-200 micron outlet nozzle for the spray created from the cosmetic composition.  
   
   
       8 . A product according to  claim 7 , wherein the means subjecting the cosmetic composition to pressure is a tensioned spring.  
   
   
       9 . A product according to  claim 8 , wherein the spring is tensioned by the operation of a lever.  
   
   
       10 . A product according to  claim 7 , wherein pressure is exerted on the cosmetic composition following the release of a latching means.