Hair colouration formulation

1. A polymeric hair colouring formulation, comprising:

at least two different chromophores and/or fluorophores linked to polymer(s), wherein the formulation comprises at least one of:

(a) a mixture of at least a first cationic coloured polymer and a second cationic coloured polymer,

wherein the first cationic coloured polymer comprises a first cationic polymer-backbone to which at least a first chromophore and/or a first fluorophore is linked, and

wherein the second cationic coloured polymer comprises a second cationic polymer-backbone to which at least a second chromophore and/or a second fluorophore different to the first chromophore and/or fluorophore is linked; and

(b) a mixture of at least a first anionic coloured polymer and a second anionic coloured polymer,

wherein the first anionic coloured polymer comprises a first anionic polymer-backbone to which at least a first chromophore and/or a first fluorophore is linked, and

wherein the second anionic coloured polymer comprises a second anionic polymer-backbone to which at least a second chromophore and/or a second fluorophore different to the first chromophore and/or fluorophore is linked

and

optionally one or more uncoloured polymer(s).

2. A polymeric hair colouring formulation of claim 1 , wherein at least one of the two different chromophores and/or fluorophores or at least one of the first or second chromophore and/or first or second fluorophore is an anionic chromophore and/or an anionic fluorophore which is linked to cationic polymer(s), or is a nonionic chromophore and/or a nonionic fluorophore which is linked to cationic polymer(s), or is a cationic chromophore and/or a cationic fluorophore which is linked to cationic polymer(s), or is an amphoteric chromophore and/or an amphoteric fluorophore which is linked to cationic polymer(s).

3. A polymeric hair colouring formulation of claim 1 ,

wherein one of the two different chromophores and/or fluorophores or one of the first or second chromophore and/or first or second fluorophore is a chromophore and/or fluorophore of a first type which is linked to the cationic polymer(s),

wherein the other one of the two different chromophores and/or fluorophores or the other one of the first or second chromophore and/or first or second fluorophore is a chromophore and/or fluorophore of a second type which is linked to cationic polymer(s),

wherein the first and second type are different from each other and are selected from anionic, cationic, nonionic, and amphoteric.

4. A polymeric hair colouring formulation of claim 1 , wherein the formulation comprises at least one anionic coloured polymer having an anionic polymer-backbone and two different chromophores and/or fluorophores linked to the anionic polymer-backbone.

5. A polymeric hair colouring formulation of claim 4 , wherein at least one of the two different chromophores and/or fluorophores is an anionic chromophore and/or an anionic fluorophore which is linked to the anionic polymer-backbone, or is a nonionic chromophore and/or a nonionic fluorophore which is linked to the anionic polymer-backbone, or is a cationic chromophore and/or a cationic fluorophore which is linked to the anionic polymer-backbone, or is an amphoteric chromophore and/or an amphoteric fluorophore which is linked to the anionic polymer-backbone.

6. A polymeric hair colouring formulation of claim 1 , wherein the respective coloured polymer(s) has a labeling degree between 1:3 to 1:50.

7. A polymeric hair colouring formulation of claim 1 , wherein the cationic polymer(s) of the coloured cationic polymer(s) comprises at least one monomer unit comprising at least one amino functional group.

8. The hair colouring formulation according to claim 1 , wherein the anionic polymer(s) of the coloured anionic polymer (s) is/are selected from the group consisting of polystyrene sulfonate salts, λ-carrageenan salts, dextran sulfate salts, polyacrylic acid salts, poly(methacrylic acid) salts, alginic acid salts, carboxymethylcellulose salts, polystyrene sulfonate/polystyrene copolymer salts, polystyrene sulfonate/maleic acid copolymers salt, copolymers thereof and mixtures thereof.

9. A method for colouring hair comprising:

applying any of the polymeric hair colouring formulations as defined in claim 1 to keratin fibres of hair to form one or more polymeric layers on the keratin fibres of the hair, so that the one or more polymeric layers comprises at least two different chromophores and/or fluorophores linked to polymer(s) of the one or more polymeric layers.

10. A method for colouring hair of claim 9 , wherein at least one, two or three of the following steps is carried out:

(i) applying a first composition comprising at least one uncoloured cationic polymer to a first portion of hair;

(ii) applying a second composition comprising at least one uncoloured anionic polymer to a second portion of the hair;

(ii) applying a third composition to a third portion of hair, wherein third composition comprises

a mixture of at least a first cationic coloured polymer and a second cationic coloured polymer, wherein the first cationic coloured polymer comprises a first cationic polymer-backbone to which at least a first chromophore and/or fluorophore is linked, and wherein the second cationic coloured polymer comprises a second cationic polymer-backbone to which at least a second chromophore and/or fluorophore different to the first chromophore and/or fluorophore is linked;

(iv) applying a fourth composition to a fourth portion of the hair, wherein the fourth composition comprises

a mixture of at least a first anionic coloured polymer and a second anionic coloured polymer, wherein the first anionic coloured polymer comprises a first anionic polymer-backbone to which at least a first chromophore and/or fluorophore is linked, and wherein the second anionic coloured polymer comprises a second anionic polymer-backbone to which at least a second chromophore and/or fluorophore different to the first chromophore and/or fluorophore is linked;

wherein the first, second, third and fourth portion have at least one common area.

11. A method for manufacturing a polymeric hair colouration composition for hair coloration, the method comprising:

(1) providing at least first and second polymer(s) each having a polymer back-bone;

(2) linking at least a first chromophore and/or a first fluorophore to the polymer back-bone of the first polymer(s) to form a first composition comprising first coloured polymer(s);

(3) linking at least a second chromophores and/or a second fluorophores, which are different from the first chromophore and/or fluorophore, to the polymer back-bone of the second polymer(s) to form a second composition comprising second coloured polymer(s); and

(4) mixing the first and second composition to form the polymeric hair colouration composition,

(5) wherein the first and second polymer(s) both are either anionic or cationic.