What did ancient people use to brush dishes and wash clothes?

An ancient washing product. Based on the technology of making "bath bean", miscellaneous sugar is added in the process of grinding pig pancreas, soda ash is used to replace bean powder, melted lard and spices are added, and then the mixture is pressed into balls or blocks. Its chemical composition is similar to that of soap today. Pancreas is mainly used in North China and Northeast China. In the late Qing Dynasty, there were more than 70 pancreatic shops in Beijing. After the rise of the new soap industry, it gradually replaced the pancreas. Until 1950s, there were still some old pancreas shops such as Hexianglou and Hua Han Chong outside Qianmen, among which Hexianglou was opened in the fourth year of Chongzhen in Ming Dynasty (A.D. 163 1). In addition, "soap" made of Gleditsia sinensis solution is also called "pancreas" customarily. The story of heroic children can be traced back to Chapter 37: "Tell our little girl to scoop a pot of cold water, first pour it on his left and right hands ... and then make some sweet-scented osmanthus and rose pancreases."