Writing ideas: mainly writing about the invention of papermaking.

Papermaking is one of the four great inventions in China. 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.

Papermaking is one of the four great inventions in China, which was invented in the Han Dynasty and perfected in the Han Dynasty. China is the first country in the world to raise silkworms and weave silk.

In ancient China, the working people used the above cocoons to make silk, and the rest of the evil cocoons and sick cocoons were made into silk floss by flocculent method. After the floc floats, some residual floc will be left on the bamboo mat.

In ancient China, the working people spun silk from superior cocoons, and the remaining evil cocoons and diseased cocoons were made into silk floss by bleaching. After floating, some residual flocs will be left on the mat.

When the flocs are floated for many times, the flocs left on the bamboo mat will accumulate into a layer of fiber sheets, which can be used for writing after being dried and peeled off. There are not many by-products of this kind of floc, which is called "He Fu" or "Xu Fang" in ancient books.

When the flossing frequency is high, the residual flossing on the pad will accumulate into fiber sheets, which can be peeled off after drying and can be used for writing. This kind of floc is called "He Qi" or "square floc" in ancient books because of its small number of by-products.

Development and history

China had papermaking in the Western Han Dynasty (206 BC), and Cai Lun improved papermaking in the first year of Yuan Xing in the Eastern Han Dynasty (105). He made paper from bark, hemp head, cloth, fishing net and other raw materials through crushing, mashing, frying and baking, which is the origin of modern paper. This kind of paper is easy to find, cheap and has improved its quality, so it is gradually widely used. In order to commemorate Cai Lun's achievements, later generations called this kind of paper "Cai Hou Paper".

Paper is the crystallization of the long-term experience and wisdom of the working people in China. Paper is a sheet fiber product, which is used for writing, printing, painting or packaging. Generally, it is made from the aqueous suspension of plant fibers through pulping, staggered combination on the net, preliminary dehydration, compression and drying. China was the first country in the world to invent paper.

According to archaeological findings, in the Western Han Dynasty (206 BC to 8 BC), China already had hemp fiber paper. Rough texture, small quantity, high cost and low popularity.