Avaliação de óleos vegetais sobre o brilho e resistência dos fios capilares submetidos a tratamentos químicos.

Abstract

Hair cosmetics are formulated to repair the fiber that needs treatment due to daily damage, such as solar radiation, the act of combing, in addition to chemical treatments, such as bleaching, dyeing, and straightening, which can cause dryness, hair breakage, and reduced shine and tension in the strands. Vegetable oils stand out as important constituents of cosmetic products, due to their moisturizing properties, and for leaving hair easy to comb. The purpose of this work was to analyze the benefits of vegetable oils on the hair fiber on two parameters: to verify the shine and the tension of the hair strands. The following vegetable oils were analyzed: argan, avocado and coconut, separately, in bleached, dyed and straightened locks. The analysis of the shine was done using the glossymeter equipment, on the locks before and after being submitted to chemical treatments: bleaching, dyeing and straightening and treated with the vegetable oils. The hair tension analysis was carried out using texturometer equipment on strands before and after chemical procedures: bleaching, dyeing, and straightening. The results show that the locks that underwent chemical procedures and were treated with the vegetable oils, showed an increase in the shine and tension value. On discolored, dyed and straightened locks, the oil that showed the highest brightness value was avocado oil. When checking the thread tension, the untreated and the dyed strands had the highest resistance to argan oil; on the discolored strands, avocado oil had the highest tension resistance. On discolored, dyed and straightened locks, the oil that showed the highest brightness value was avocado oil. When checking the thread tension, the untreated and the dyed strands had the highest resistance to argan oil; on the discolored strands, avocado oil had the highest tension resistance. Thus, we observe that the strands submitted to chemical treatments can be repaired with the use of vegetable oils.