Cosmetic Assessment of Human Hair by Confocal Microscopy

The study highlighted the advantages of using confocal microscopy over traditional scanning electron microscopy (SEM) for the cosmetic assessment of human hair. Confocal microscopy required minimal sample preparation and allowed observation of hair in its natural state with less damage. It was used to monitor the effectiveness of cleansing shampoos, assess the uniformity of polymer layers, and evaluate changes in hair's optical properties. Additionally, the fluorescence channel of the microscope revealed the internal structure of hair, showing the pathways of penetration and the geometry of cortical cells and the medulla. This technology proved to be a valuable tool for understanding the interrelationships between different hair components and for cosmetic evaluations.