METHOD FOR FAST DETERMINING OXIDATIVE HAIR DAMAGE OF SAID HAIR SAMPLES WITHOUT DESTRUCTION

摘要

Method (100) for determining oxidative hair damage in view of determining if hair product(s) may be applied on said hair comprising: -a step (101) of emitting mid-infrared light collecting a background spectrum under said mid-infrared light; and -a step (102) of fixing the hair samples; and -a step (103) of emitting mid-infrared light and collecting a spectrum of the hair sample under said mid-infrared light; The method further comprises: -a step (104) of adjusting the spectrum baselineat zero absorbance on the selected wavelengths and fixing the intensity of the signal at said specific wavelength at a reference value, to obtain a normalized value of the infra-redspectrum; and -a step (105) of processing said normalized value in order to obtain an automatically converted numerical value of cysteic acid, which corresponds to the oxidative marker for hairs.