The Aiseli High Precision Spectrophotometer Ci6x series (skin colorimeter) can not only accurately measure L * a * b * color space data, but also adopt different measurement methods for different cosmetic appearance performances, matching more effective and accurate skin color management solutions. We have comprehensive solutions for color comparison, color development, makeup application, whitening, and sun protection efficacy evaluation in cosmetics. Measure the L *, a *, and b * values of each observation point in the experimental and control areas using the Ci6x series spectrophotometer. Test each area three times and record the results. The parameter for calculating the individual type angle (ITA °) of skin color is as follows:

The larger the ITA ° value, the lighter the skin tone; conversely, the darker the skin tone, L - represents brightness (indicating the change in color from black to white); A - represents the amount of hemoglobin or erythema (indicating the change in color from green to red), the soothing effect, and the characterization of the efficacy of evaluating dark circles under the eyes; B - represents the amount of pigment (indicating the change in color from blue to yellow)