Composition for coloring keratin fibres

1. Process for coloring hair comprising mixing a composition comprising at least one oxidative dyestuff precursor and yogurt powder with an oxidizing composition comprising an oxidizing agent to form a mixture, applying the mixture onto hair, leaving the mixture on the hair for 10 to 45 minutes at a temperature of 20 to 40° C., and subsequently rinsing off with water.

2. The process according to claim 1 , wherein the composition further comprises at least one coupling agent.

3. The process according to claim 1 , wherein the composition further comprises at least one direct dye.

4. The process according to claim 1 , wherein the yogurt powder is at a concentration of 0.01 to 5% by weight calculated to total composition excluding oxidizing composition.

5. The process according to claim 1 , wherein the composition further comprises organosiloxane polymer according to formula

wherein m and n each are numbers from 20 to 10,000, x is a number between 1 and 5, and y is a number from 5 to 30, R 15 is a C1-C12-alkyl or aryl group.

6. The process according to claim 1 , wherein the composition further comprises at least one ceramide type compound according to the formula

where R 18 and R 19 are independent from each other alkyl- or alkenyl group with 10 to 22 carbon atoms, R 20 is methyl, ethyl, n-propyl or isopropyl group and n is a number between 1 to 6, 2 or 3.

7. The process according to claim 1 , wherein the composition further comprises at least one ubiquinone of the formula

wherein n is a number from 1 to 10.

8. The process according to claim 1 , wherein the composition further comprises potassium or sodium iodide and/or dihydroxyacetone for as catalysts.

9. The process according to claim 1 , wherein the composition has pH between 5 and 12 after mixing with the oxidizing composition.

10. The process according to claim 5 , wherein the alkyl group is selected from the group consisting of methyl and ethyl and the aryl group represented by a benzyl group, and Y − is an anion.

11. The process according to claim 9 , wherein the oxidizing composition is a hydrogen peroxide solution.

12. The process for coloring hair according to claim 1 , wherein oxidizing agent is hydrogen peroxide.

13. Hair coloring kit comprising two compositions A and B which are mixed prior to application onto hair wherein composition A is the composition comprising at least one oxidative dyestuff precursor and yogurt powder and the composition B comprises at least one oxidizing agent.

14. The hair coloring kit according to claim 13 , wherein the oxidizing agent is hydrogen peroxide.