Grinding solids down to fine powders or dust by crushing, pounding, or milling. Food factories pulverize grain into flour, spices into aromatic powders, sugar into icing fineness, and dried mixes into instant beverages, with particle size dictating how quickly powders dissolve, how they feel in the mouth, and how fast they react. Heat buildup during milling must be controlled to protect flavors and nutrients, and dust control is a safety imperative, since airborne flour and sugar dust can explode. Sieving and air classification then standardize the grind.