EVALUATION OF COLOR FASTNESS AND SKIN IRRITATION OF HAIR DYE CREAM FROM HENNA LEAVES (LAWSONIA INERMIS L.)

Tóm tắt

Objectives: This study aims to evaluate the color fastness and study the skin irritation of a natural hair dye cream from Henna leaves. Materials and method: Nineteen experimental (F1-F19) are conducted using the D-optimal model to evaluate the cause-effect relations and evaluate the color fastness of hair dye cream. Three independent variables were selected for the survey namely Henna extract concentration (X₁ includes 5%, 10%, 15%), pH of cream (X₂ includes 6, 7, 8), hydrogen peroxide concentration (X₃ includes 0%, 2%, 4%). Three dependent variables include color fastness after 1 washes (Y₁), 6 washes (Y₂) and 12 washes (Y₃). Test for skin irritation hair dye cream was applied for rabbits. Results: the optimal parameters of hair dye cream were identified, which included Henna extract concentration of 10%, pH of 6, hydrogen peroxide concentration of 4%. The fastness property of the dye was observed to be very good even after washing 12 times and the absence of sensitivity or reaction on the skin. Conclusion: The results showed that the product has the ability to dye hair and is safe for the skin.