In ancient times, rapeseed oil extraction has many other uses in addition to edible

In ancient times, rapeseed oil extraction had many other uses besides consumption. One of the main uses was to make lamp oil. Due to the good quality of oil extracted from rapeseed, it could be used not only for lighting lamps, but also for making soap and dyes. In addition, the oil extracted from rapeseed can also be used in the medical field as a medicine for skin diseases. In ancient times, people also discovered a way to use rapeseed oil for mechanical lubrication, and this method was widely used in the mechanical manufacturing industry at that time.

Historically, China was one of the major producers of rapeseed oil. During the Song Dynasty, China's rapeseed oil extraction industry was greatly developed. At that time, people invented a method called ? Wagon Press. which could be used to extract rapeseed oil. This tool was not only efficient but also easy to operate, so it was widely used. In addition, during the Tang Dynasty, people also invented a tool called "water power press", which was used to extract rapeseed oil. Hydraulic Pressing which utilizes the principle of water power to extract rapeseed oil more efficiently.

All in all, ancient rapeseed oil extraction has many other uses besides consumption. It can not only be used to make lamp oil, soap solution and dyes, but also used in fields such as medical treatment and machine building. The invention and application of these traditional oil-pressing techniques made great contributions to the economic and cultural development of China.