Width and height measurements: according to the sampling angle price drops resulting picture, select the leftmost point drop, click and hold the left mouse button, drag the cursor to the right-most point of the water droplets, and then drag the cursor to the highest point of the water droplets release the left mouse key, the system according to the final contour fit of the measured data stored in the data storage area. Water droplet contact angle measurement angle measurement artificial tangential contact angle measurement: according to the sampling angle of water droplets resulting images, select the leftmost point drop, click the left mouse button, drag the cursor to the right most point drop, do along the outer contour of the liquid liquid tangent, and finally the system according to the fitted tangents measured data stored in the data storage area. :( Aids aids when applied to concave, convex contact angle test) Click aids maintenance droplets angle into the auxiliary tool interface, could be the creation of material on the surface of the surface as shown in Figure 2.1.10 destroy intermolecular bond measure. In solid state physics theory, the surface atoms than the internal atomic species have more energy drops angle measurement, therefore, based on the principle of minimum energy, the atoms inside the material tends to be spontaneous and not the surface. Another definition of the surface energy, the material surface with respect to the inner material of the extra energy. Define new power-generating unit surface area made: y = dw / ds substance surface material having a surface tension σ, reversibly increase the surface area dA, you need to power σdA at constant temperature and pressure, because the required power equal freedom Mixture energy increase, and this increase is due to an increase in surface area due Mixture, it is called the surface free energy or surface energy. Angle price drops, ShengDing instrument (certified), drop angle provided by Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) is Dongguan, Guangdong, dedicated instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum limits to meet customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create ShengDing instrument a better future. You can also access (www.dgshengding.com/supply_details_41264445.html), for more information about the company.