Inksticks (Chinese: 墨 Mò) or ink cakes are a type of solid Chinese ink used traditionally in several Chinese and East Asian art forms such as calligraphy and brush painting. Inksticks are made mainly of soot and animal glue, sometimes with incense or medicinal scents added. To make ink, the inkstick is ground against an inkstone with a small quantity of water to produce a dark liquid which is then applied with an ink brush. Artists and calligraphers may vary the concentration of the resulting ink according to their preferences by reducing or increasing the intensity and duration of ink grinding.
Along with the inkstone, ink brush, and paper, the inkstick is considered one of the Four Treasures of the Study of classical Chinese literary culture.