ABSTRACT
Dry solid food materials can exist in various forms and dimensions. This may range from pieces to very fine nanosize powders. The dimensions of individual particulates may vary from a few microns (or even nanosize) to several millimeters or centimeters. Food powders generally have the dimension of few millimeters down to a few micrometers. Granular products (diameters of a few millimeters) are also categorized as powders. In this chapter, dried foods are referred to as powders, since the powder form is the most common dry state of food materials.
