Summary Present invention relates to a process for treating hair for achieving better oxidative coloration with improved durability and improved hair conditioning. Accordingly, the first object of the present invention is a process for treating hair comprising the steps wherein hair is dyed with a composition comprising one or more hair dye and at least one oxidizing agent wherein the composition is obtained by mixing two compositions wherein the first composition, composition A, comprises one or more hair dye and the second composition, Composition B, comprises at least one oxidizing agent, and in a further step hair is treated with a composition (Composition C) comprising at least one surfactant other than amino acid surfactant with the condition that at least two of the compositions A, B and C comprise at least one amino acid surfactant and composition C is substantially free from sulphate surfactants.
