| 摘要 |
PURPOSE: A quantitative method with respect to water resistance of a makeup product through turbidity analysis is provided to objectively and visually evaluate water resistance through the turbidity level, and to enhance reliability of the makeup product. CONSTITUTION: A quantitative method with respect to water resistance of a makeup product through turbidity analysis comprises: a step of preparing a film with a groove, and applying the makeup product on the film before drying; a step of treating the film by ultrasonic waves for a predetermined time; a step of putting the film into a tube containing a buffer solution, and heating to separate the makeup product and the film; a step of centrifuging the solution in the tube; and a step of collecting a supernatant and measuring turbidity. [Reference numerals] (AA) Test group; (BB) Control group; (CC) Before ultrasonic wave treatment; (DD) 1hour after ultrasonic wave treatment; (EE) 2 hour after ultrasonic wave treatment;
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