The knowledge of droplet adhesion and shedding is paramount in the development of anti-icing coatings, which will increase the efficiency of windmills in a cold region, agricultural industry and many more. If the adhesion force of a droplet is overcome by the external aerodynamic or other body forces on the drop, then the shedding of droplet takes place. The droplet adhesion or shedding can be also be quantified by the characterisation of substrate.