First, the earliest soap According to records, the earliest soap in China was invented in the Wei, Jin, Southern and Northern Dynasties. Bath beans? Can you tell by the name? Bath beans? Besides pig pancreas, our raw materials also include beans. Digestive enzymes in pig pancreas have cleaning function, and soybean powder made from beans can make pancreas have stronger emulsifying ability. It is the ingenious combination of these two raw materials that produces the function of soap. Once the pancreas was invented, it was welcomed by the public.
Second, expensive? Bath beans? But then what? Bath beans? Expensive to a certain extent, really only dignitaries can use it. There was once a scholar in the Song Dynasty, Wang Anshi. Bath beans? About the story, Wang Anshi saw that his face was black, and he felt that there was something wrong with him. Later, Wang Anshi went to see a doctor, and the doctor gave him a prescription, even if he used it every day. Bath beans? Wash your face, but in the end Wang Anshi was useless because of the price? Bath beans? .
Third, the birth of the pancreas, but the wisdom of ancient humans is great. Later, people found an improved method. They found that plant ash was more useful than soybean flour, so they gave up soybean flour. The reason why plant ash is mainly composed of carbonate compounds such as potassium carbonate is explained by existing knowledge. These carbonic acid compounds are alkaline and can make the pancreas cleaner. Other raw materials have also changed from the original simple pancreas to the compound of pancreas and fat. With the addition of fat, the volume of pancreas has become much larger, and the price of pancreas has gradually decreased with the increase of output, which is no longer the exclusive product of the rich in ancient times.