Why do water droplets cover glass angle, contact angle testing purposes: contact angle tester to test the contact angle glass lens surface characteristics, the drop angle indirect analysis glass surface hydrophobicity degree, determine the product surface to facilitate antifouling power. Divided into the following three test methods: 1. Directly in the finished water drops do the above angle test. 2. Surface untreated angle test before doing water drops. 3. do wear after several water delivery angle measurements. High temperature expansion and contraction of the visual apparatus is a test sample using a parallel light beam heated by changes in sample projected on the background to the real-time observation and firing the expansion and contraction of the equipment parameters of the sample requirements for ceramic samples: high temperature powder contact angle measurements unsintered instrument, dry pressed into Φ2-25 mm, a height of not more than 10mm film. Firing system: to develop high-temperature metal sintering system according to the requirements of the contact angle measurements, the maximum temperature does not exceed 1600oC, 1000oC the following heating rate of not more than 30oC / min, 1000oC over not more than 10oC / min. Drop angle meter | Shengding equipment (certified) | contact angles provided by the Dongguan City Ding Sheng Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) Dongguan, Guangdong, dedicated instrumentation leaders, over the years, the company implement 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 better future.