Abstract: A method for colouring hair, wherein the method comprises: (i) the formation of a first plurality of coated hair fibre portions, wherein the coating comprises a first composition, wherein the first composition comprises a first hair colouring agent, a hydrophobic phase, a hydrophilic phase, a surfactant, and a thickener capable of interacting with the hydrophobic phase and the hydrophilic phase; and subsequently (ii) styling the hair wherein the first plurality of coated hair fibre portions is contacted with a second plurality of hair fibre portions; wherein the method does not comprise the application of a solid barrier means in order to separate the first plurality of coated hair fibre portions from the second plurality of hair fibre portions, and wherein the first composition is substantially free of persulfate.