Applicator for applying a hair treatment composition to a bundle of hair strands

1. A method to treat the hair wherein one hair strand are contacted with an applicator for applying a hair treatment composition to the hair, wherein the method comprises the steps of:

i) loading a hair treatment composition into an applicator to form a loaded applicator,

ii) positioning the loaded applicator, the loaded applicator in an open position, at the root-line of the one hair strand,

iii) closing the loaded applicator to form a closed loaded applicator, and

iv) swiping the closed loaded applicator along the length of the one hair strand;

and wherein the applicator comprises a plate and a containment portion;

wherein said plate has a perimeter, a substantially flat internal surface and an external surface; wherein said containment portion comprises a base and a wall, said wall emerging from said base and extending upwardly, said wall having a rim and said rim defining an opening and an internal volume of said containment portion;

wherein said plate and said containment portion are movably joined by a connection so that said applicator may alternate between a closed state and an open state, wherein when said applicator is in a closed state, said substantially flat internal surface of said plate is in a juxtaposed relationship to said opening of said containment portion and wherein when said applicator is in an open state, said substantially flat internal surface of said plate is in a distal relationship to said opening of said containment portion;

wherein a first fin and a second fin projects from said substantially flat internal surface of said plate and forms with said substantially flat internal surface an acute angle α of from about 25° to about 55°; wherein said first fin and a second fin extends for an average first length (L 1 ) of from about 1 mm to about 50 mm;

wherein said first fin and a second fin comprises a proximal edge and a distal edge;

wherein said proximal edge is attached to said substantially flat internal surface of said plate and wherein the distal edges of the first and second fin verge one toward the other without touching.

2. The method according to claim 1 to provide a hair strand effects.

3. The method according to claim 1 to highlight a hair strand.

4. The method according to claim 1 , wherein said composition comprises a rheology of from about 10 Pa to about 160 Pa at 1 s −1 .

5. The method according to claim 1 , wherein said acute angles α and/or β are from about 35° to about 55°.

6. The method according to claim 1 , wherein said acute angle α and said acute angle β are substantially identical.

7. The method according to claim 1 , wherein said average first length (L 1 ) and said average second length (L 2 ) are substantially identical.

8. The method according to claim 1 , wherein said proximal edge of said first fin is substantially parallel to said proximal edge of said second fin.

9. The method according to claim 1 , wherein said substantially flat internal surface of said plate comprises an axis Y which extends straight from the centre of said substantially flat internal surface of said plate and crosses transversally said connection, and wherein said proximal edge of said first fin, is substantially parallel to said axis Y.

10. The method according to claim 1 , wherein when said applicator is in closed state, said applicator comprises an average distance (D 1 ) from said substantially flat internal surface of said plate to said rim of said wall of said containment portion, wherein said average distance (D 1 ) is from about 0.5 mm to about 5.0 mm.

11. The method according to claim 1 , wherein said perimeter of said plate has a substantially identical extension of said rim of said wall of said containment portion.

12. The method according to claim 1 , wherein a hair treatment composition is loaded into said applicator, said applicator is positioned at the root-line of said one hair strand, in an open state and then subsequently brought into a closed state, and wherein said applicator is swiped along the length of said one hair strand.

13. The method according to claim 1 , wherein the plate, the containment portion or both have a sealing means located thereon, wherein the sealing means is selected from polyurethane and polyolefin foams, non-wovens, felts, paper boards, metal-based substrates and aluminium foils, and filmic substrates.