Papermaking is one of the four great inventions in China, which was invented in Han Dynasty and Western Han Dynasty, and improved in Han Dynasty and Eastern Han Dynasty. China is the first country in the world to raise silkworms and weave silk. In ancient China, the cocoons of the working people and above were drawn into silk, and the rest of the evil cocoons and sick cocoons were made into silk floss by bleaching.
After bleaching, some residual flocs will be left on the mat. When the number of bleaching flocks is increased, the residual flocs on the grid will accumulate into a fiber sheet, which will be peeled off after being dried and can be used for writing. The number of by-products of this kind of bleaching is small, and it is called Herculum or Square Flour in ancient books.
Papermaking is one of the four great inventions in China. It was invented in the Western Han Dynasty and improved in the Eastern Han Dynasty. China is the first country in the world to raise silkworms and weave silk.
In particular, Cai Lun's improved papermaking (also known as "Cai Hou paper") in the Eastern Han Dynasty was a revolution in writing materials. It was easy to carry and widely used. It promoted the cultural development of China, Arabia, Europe and even the whole world.