Human or animal keratin fiber i.e. dry hair, treating method, involves exposing portion of keratin fiber to light pulse to provide residual deformation to fiber portion, which conserves cross-section in which fiber is drawn

摘要

The method involves modifying a cross-section of a portion of a human or animal keratin fiber (F) by crushing and/or stretching of the fiber, and exposing the portion of the keratin fiber to a light pulse to provide a residual deformation to the portion of the keratin fiber, where the portion of the keratin fiber conserves the cross-section in which the fiber is drawn. The portion cross-section modifying process is carried out by exposition of the external pressure different from the atmospheric pressure. An independent claim is also included for a system for treating a portion of a human or animal keratin fiber.