The present invention relates to a process for cosmetic treatment of one or more keratin fibres, in particular human keratin fibres, especially one or more eyelashes or eyebrows, comprising the moulding of at least one cosmetic composition onto at least one part of said fibre(s), by means of one or more cavities (5) of a mould (2) into which said fibre(s) is (are) at least partially introduced.
