, The measured value is the most direct and accurate image analysis method or appearance.

Contact angle existing test methods are usually two: one for shape image analysis methods; Second weighing method as the latter often called wetting balance or osmosis contact angle meter, but the most widely used, the measured value is best or directly with the exact shape image analysis methods.
The principle of appearance of the image analysis method, the liquid drops on the surface of a solid sample, mcb circuit breaker the camera head through a microscope droplet shape image, and then use some algorithms of mcb circuit breaker processing and the image of the droplet contact angle is calculated. Calculation the contact angle method is generally based on a specific mathematical models such as balls or droplets can be regarded as a part of a cone, then by measuring certain electric meter as width / height, or by direct fit to the calculated value of the contact angle. Describes a closed interface, the external pressure difference and the interface between the curvature and the interfacial tension can be used to accurately describe a droplet axisymmetric contour, to calculate the contact angle.