A method of treating hair, a hair treatment kit for extemporaneous preparation of hair treatment compositions, a recipient for applying hair treatment compositions, and use thereof are provided. The invention provides a superior hair treatment performance such as a superior hair colouring and/or bleaching performance, particularly for providing superior root to tip treatment evenness.

The applicator for applying a haircare product comprises a base 12 and spikes 14 protruding with respect to the base. At least a plurality of spikes 14 each have a cross section of elongate shape in at least one direction of extension. At least some of the spikes of said plurality of spikes are made at least partially of porous material that is able to absorb said haircare product.