This pigment is called inkpad. According to historical records, Indy has a history of 2000 years. Inpad was used as early as the Spring and Autumn Period, Qin and Han Dynasties. At that time, the inkpad was made of clay and soaked in water when it was used. This was called mud sealing at that time. After the Sui and Tang Dynasties, with the development of society, some people developed paper. Instead, people mixed vermilion on the printing surface and printed it on paper. This is the embryonic form of inkpad. In the Yuan Dynasty, people began to mix cinnabar with oil, and then gradually developed into our modern inkpad.
There are many varieties of inkpad, and the red ones are generally divided into cinnabar, vermilion and wide drift. Cinnabar inkpad is dark purple, some people call it purple sand, which is a kind of cinnabar deposited at the bottom of mortar when making cinnabar. Inks made of cinnabar are bright red and purple, thick and calm, and the most beautiful.