In ancient times, all inks were made by hand, and the main processes were cigarette melting, blending, making, drying and tracing gold. At present, the earliest archaeological discovery of ink was in the Neolithic Age, when ink was already inseparable from people's lives. Ink painting is the dominant art of ancient calligraphy and painting in China. The prosperity of ink painting in past dynasties made ink painting a symbol of China.
Mexico ranks second in Four Treasures of the Study. It is not only practical, but also a work of art integrating painting, calligraphy and sculpture, which has the dual value of collection and appreciation. It plays an important role in the cultural history of China. Ink has a long history and a wide variety. According to the raw materials, it can be roughly divided into Song Yanmo ink, children's eye ink, lacquer ink and Youyan ink.