Flake ice can be defined as dry and supercooled small ice in the form of flat pieces of irregular pancake shape. This type of small ice is formed by spraying or pouring water onto a chilled surface, usually in the form of a cylinder or drum. Water freezes on the surface, forming thin layers of ice (2-3 mm thick). A scraper removes supercooled ice, which is cut into small pieces that look like shards of glass. These pieces of ice usually fall directly from the drum into a refrigerated compartment for storage. The roller can rotate in a vertical or horizontal plane.