Everything You Need to Know about Contact Angle

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The contact angle refers to the angle formed when the liquid phase is sandwiched by the gas-liquid interface and the two tangents of the solid-liquid interface at the solid surface of a liquid drop on a solid horizontal plane. A contact angle measurement device is mainly used to measure the contact angle of liquid to solid, that is, the wettability of liquid to solid. It can measure the contact angle of various liquids with various materials. It is widely used in mineral flotation, water injection and oil recovery, washing, printing and dyeing, welding, etc.
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