**4.5 Spray coating**

Coating by spraying method helps to reduce in waste of coating solution by means of spraying system [80]. Spray coating is mainly preferred for that food which has large surface area [48]. The spray coating method is used mostly in combination with another method such as pan coating. But we can use it alone too. With the help of the spray coating method possible to spray molten chocolate, molten waxes, an aqueous

**Figure 8.** *Screw coating. Source: Gamboni et al. [126].*

solution or molten lipid in both thin as well as thick layers. For spraying, high-pressure nozzles are used but also the type of product which is coated. Spraying may be affected by fluid viscosity, temperature, pressure, the shape of the nozzle [114]. The apparatus for spray coating of wax on fruit and vegetables is patented by Cuning and Caulkins [164].
