**4.3 Drum coating**

Drum coating is one of the methods through which a thin or thick layer can be applied to the hard or solid product (nut). **Figure 7** illustrates the drum coating machine, it is run continuously. It is used in oiling and salting of nuts which enhance the palatability and flavour and helps to delay oxidation. In chocolate, this method of coating helps to delay the absorption of moisture.

*Application of Edible Packaging in Dairy and Food Industry DOI: http://dx.doi.org/10.5772/intechopen.107850*

#### **Figure 6.**

*Pan coating technique. Source: Agrawal and Pandey [162].*

#### **Figure 7.**

*Drum coating machine. Source: Suhag et al. [127].*

#### **4.4 Screw coating and fluidised-bed coating**

Screw coating is used to apply thin layer coating material on solid as well as firm food (**Figure 8**). It is a continuous process. To improve anti-caking of cheese, this coating method is used. For applying very thin layer of edible coating on dry particles having smaller size and very low density, this coating method is used mostly. Coating the powder by this method prevents agglomeration and enhances the dispersion and solubility of coating material [114].
