The main purpose of measuring the contact angle are you doing? Measurement method can be used to calculate the surface tension measuring the contact angle. But my clients are judged by the contact angle of the hydrophilic, in order to confirm the effect of surface treatment or cleaning. Measuring the contact angle have a special machine. Domestic imports are there. The price is not the same. You can contact angle Dongguan Sheng Ding precision instruments. The measuring instrument has the following characteristics: 1, which could be measured, the contact angle, unlike stationary contact angle measuring instrument is restricted machine size. 2, dropping small drops of water, to reach the minimum 0.1ul, reducing the influence of gravity, the measurement was not affected somewhat uneven. 3, due to the small size of the machine, can be measured on a non-flat objects like circular and the like. 4, low contact angle tester, automatic measuring the contact angle equipment maintenance upgrades, built-in camera to take pictures of water droplets dripping the whole process, you can manually measure. Why increase the surface roughness and the contact surface contact angle of water droplets will not necessarily be increased. To look at your material is hydrophilic or hydrophobic. If it is a hydrophilic material, surface roughness will reduce the contact surface contact angle of water droplets The for hydrophobic materials, due to surface roughness, vacuum contact angle measurement, in fact, increase the contact area of ??water and materials, if the contact angle does not change, the water surface area larger than the original because of the water always driven by the surface tension of water to reduce its surface area, so the drop will be reduced by increasing the surface area of ??the contact angle of water droplets attension corner |. The contact angle | Shengding instrument provided by the Dongguan City Ding Sheng Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) strong, credible, in Dongguan, Guangdong specialized instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengding instrument into the brilliant and you work for a better future!