Sumi ink is a traditional black ink used in East Asian calligraphy and painting. It is made from soot, typically derived from burning pine or other organic materials, mixed with a binding agent. The ink is ground on an ink stone with a small amount of water to achieve the desired consistency. Sumi ink is valued for its rich, deep color and versatility, allowing artists to create a range of tones and textures. This ink is commonly associated with Chinese, Japanese, and Korean art forms, where it plays a crucial role in ink wash painting and calligraphy. Sumi ink is often used with brushes made from animal hair, enabling artists to produce expressive strokes and intricate details. Its cultural significance and unique properties make it a staple in traditional art practices.