Process for treating hair fibres

A process for treating hair fibres with an apparatus comprising a first arm and a second arm articulated together so as to form tongs configured to carry out the various steps of the process successively and separately on the hair fibres in a closed configuration of the first and second arms, by movement of said apparatus over a portion of the hair fibres extending between the first arm and the second arm of the apparatus in the closed configuration of the first and second arms, the process comprising:

• (i) combing said hair fibres with a comb borne on the second arm,
• (ii) applying vapour to said hair fibres, wherein a flow rate of vapour applied is less than 1 g/min, and wherein the application of vapour is in a confined space formed by a groove in the first arm facing at least one vapour outlet on the second arm in the closed configuration of the first and second arms, a bottom of the groove being centered on the at least one vapour outlet, the vapour accumulating into the confined space, the comb extending outside the groove,
• (iii) hair shaping, by heat treatment without vapour, of the hair fibres by grasping the hair fibres between at least two plates facing one another, wherein at least one of the at least two plates is a heating plate,
• wherein (ii) and (iii) are performed separately over a same zone of the hair fibres,
• wherein (iii) is performed after (ii) over the same zone of the hair fibres, and
• wherein said same zone of the hair fibres is not grasped between the plates before and during (ii), and
• wherein the process does not comprise applying a cosmetic composition to the hair fibres with the apparatus.