Method of measuring hair elasticity

The invention relates to a method for measuring hair elasticity. One end of the hair is fixed on a vertical plane (V), and the hair elasticity is determined by using an inclined angle (Theta) from a horizontal plane (H) due to gravity of the hair and a vertical distance (y) away from the horizontal plane (H). according to the method for measuring the hair elasticity, compared with the conventional method for qualitatively performing comparison and assessment on the hair elasticity by using the inclined angle of the hair with respect to the vertical plane, the method considers the weight of the hair and the inclined distance of the hair, can calculate the hair elasticity through a numerical expression, and can perform comparison and analysis on accurate quantitative values. Compared with the conventional methods for multiple tests on lots of hair samples to improve the reliability in a stress curve result, the method can calculate the hair elasticity through the numerical expression, thereby reducing the requi