Effect of Eucalyptus Extract on Bleach Hair

Abstract

Purpose: This study aims to investigate the effects of eucalyptus oil on damaged hair. Methods: Eucalyptus formulations were prepared by adding 0, 3, 6, or 9 g of eucalyptus extract, and these formulations were applied to level 8 bleached hair samples. Various parameters were then measured and compared in the treated bleached hair. The impact of eucalyptus extract on hair brightness was assessed by measuring L * values using a color difference meter. Additionally, tensile strength, absorbance (determined using methylene blue), and gloss of the bleached hair were measured. Results: Measurement analysis showed that L * values increased as the content of eucalyptus extract applied to bleached hair increased. A statistically significant difference in brightness was observed among 8L(3), 8L(6), and 8L(9) samples. Furthermore, average tensile strength of the hair increased as extract content increased, although the difference did not reach statistical significance. Absorbance analysis revealed a significant difference between the average value and statistical analysis value for each sample, indicating that eucalyptus extract affects the absorbance of bleached hair. Gloss analysis also revealed differences in average values as extract content increased, with a significant difference observed at 8L(6) and 8L(9) but not 8L(3), suggesting that eucalyptus extract affects hair gloss in a content-dependent manner. Conclusion: Statistical analysis of average values revealed that eucalyptus extract affected bleached hair in terms of brightness, absorbance, and gloss, with different eucalyptus extract contents having different effects on the hair. Future studies should investigate the effects of various other natural extracts on bleached hair.