What did Cai Lun invent?

Cai Lun (about 63 years-12 1 year). A native of Leiyang (now leiyang city, Hunan Province), Guiyang County, Eastern Han Dynasty. He improved papermaking in the Eastern Han Dynasty and was reputed as the inventor of papermaking in four great inventions of ancient china.

Cai Lun entered the palace at the end of Emperor Gaozu Yongping, and in the early years of Emperor Gaozu Zhang served as Xiaohuangmen (lower eunuch). After Han and Emperor acceded to the throne, he was promoted to Zhong Changshi and participated in the planning of state secrets. Cai Lun has real talent and practical learning, and he is loyal to his duties as an official. He repeatedly violated the majesty of the emperor, remonstrated and pointed out the gains and losses of the court.

Later, Cai Lun served as an official order to supervise the production of palace supplies. It is believed that it was from this time that Cai Lun began to get in touch with the best handicrafts in the Eastern Han Dynasty and improved the papermaking technology at that time. According to "Biography of Officials in the Later Han Dynasty", books and documents have been written with bamboo slips since ancient times. Later, silks with soft texture appeared, but the cost of making paper with silks was very high, and bamboo slips were bulky. Therefore, Cai Lun wanted to carry out technological innovation and make paper with cheap things such as bark, rags, hemp heads and fishing nets, which greatly reduced the cost of making paper. In the first year of Yuan Xing in Han Dynasty (105), Cai Lun reported to the emperor the achievements of improving papermaking. The emperor appreciated Cai Lun's talent very much, and promoted the improved papermaking technology to various places. In the first year of Emperor Xing of the Han and Yuan Dynasties (1 14), the court named Cai Lun Longtinghou, so people later called the paper "Cai Hou Paper".

Later, Cai Lun was involved in the court struggle, and at the instigation of Dou Taihou, who was in power, participated in framing Han Andi's grandmother. Later, he became the right-hand man of Dou Taihou's wife, Empress Dowager Deng. After the death of Empress Dowager Deng, Emperor Gaozu asked him to surrender to Tingwei. In order to avoid humiliation, Cai Lun bathed all over, put on clean clothes and committed suicide by taking poison. After his death, Cai Lun was buried in his fief, Long Ting (now Yangxian County, Shaanxi Province).

What did Cai Lun invent?

This is not an invention. This is shit paper. . .

Adopt it

Cai Lun invented how to invent paper.

Cai Lun was a native of Guiyang (Hengyang Leiyang) in the Eastern Han Dynasty. When he was in harmony with the emperor, he was a regular waiter and served as an official in charge of making imperial vessels. In the first year of Yuan Dynasty (A.D. 1 14), Andi was named Long Houting. He summed up the experience of papermaking with hemp fiber since the Western Han Dynasty, improved the papermaking technology, and adopted bark, hemp head, rags and old fishing nets. People who use silk are called paper. Silk is expensive and simple, so it is not convenient for people to use. Karen is an idea to make paper from bark, hemp head, cloth and fishing nets. "Later generations as the inventor of China papermaking.

Cai Lun lived in the late Eastern Han Dynasty, the emperor, a native of Guiyang, which is now Laiyang, Hunan. Decades before Cai Lun was born, a large-scale peasant uprising took place in China. The uprising hit the feudal rule to a certain extent and promoted the development of social productive forces. From the early years of the Eastern Han Dynasty to Emperor Wudi of the Han Dynasty, agriculture and handicrafts made continuous progress. The development of social economy puts forward higher requirements for paper production.

When Cai Lun was a child, he went to the imperial court as a eunuch, and his position was relatively low-Xiaohuangmen. Later, he was trusted by Han and Emperor, and was promoted to be a constant servant to participate in state secret affairs. He also worked as an official in charge of palace supplies-Shang Fangling, supervising craftsmen to make swords and other equipment for the royal family, so he often contacted craftsmen. The superb technology and creative spirit of the working people have a great influence on him.

At that time, Cai Lun saw that it was inconvenient for everyone to write, bamboo slips and wooden slips were too heavy, silk was too expensive, and silk tissue paper could not be produced in large quantities, all of which had shortcomings. So he studied ways to improve papermaking.

Cai Lun summed up the experience of predecessors in papermaking, and led craftsmen to make paper with raw materials such as bark hemp, rags and broken fishing nets. They first cut or cut bark hemp, rags and broken fishing nets, soaked them in water for a long time, then mashed them into pulp, maybe boiled them, and then spread them on mats to dry, thus turning them into paper.

The paper made by this method is light and thin, which is very suitable for writing and has been welcomed by people. In the first year of Yuan Xing in the Eastern Han Dynasty (A.D. 105), Cai Lun reported this great achievement to Emperor Wu, who praised him. Since then, paper has been made in this way all over the country.

Paper-making technology is very complicated, which is beyond one's imagination. In fact, before Cai Lun, working people used plant fibers to make paper. Therefore, we can't say that paper was invented by Cai Lun, but we must also affirm Cai Lun's great contribution in improving papermaking technology.

Cai Lun led artisans to improve paper-making methods and made high-quality paper. He proposed using bark, hemp head, rags and broken fishing nets as raw materials, which was also a great progress in papermaking technology. These raw materials are widely available and cheap, and some of them are also used as waste, so they can be produced in large quantities. As for using bark as raw material, it is a new discovery. Later generations made paper with wood pulp, which was the inspiration of Cai Lun's making paper with bark.

Cai Lun's success in improving papermaking methods is a great event in the history of human culture. Since then, mass production of paper has become possible, creating material conditions for the printing of bookends in the future.

After Cai Lun, others constantly improved his methods. About eighty years after Cai Lun's death (at the end of the Eastern Han Dynasty), another paper expert named Zuo Bo appeared. The paper he made is even in thickness, delicate in texture and bright in color. At that time, people called it "Zuo Bo Paper". Unfortunately, the raw materials and manufacturing methods used in Zuo Bo are not recorded in history.

Ancient inventions. Cai Lun invented (). Bi Sheng invented ().

Cai Lun invented (papermaking). Bi Sheng invented movable type printing.

What did Marconi, Bi Sheng, Zhang Heng, Siemens, Bell, Cai Lun, Nobel, Edison, Fulton and Morse invent?

Marconi (1874 ~ 1937), an Italian inventor in guglielmo. The founder of radio communication.

Bi Sheng (? -about 105 1) Buyi was the inventor of movable type printing in the Northern Song Dynasty.

Zhang Heng (78- 139), alias Han nationality, was a great astronomer, mathematician, inventor, geographer, cartographer, writer and scholar in the Eastern Han Dynasty, and made indelible contributions to the development of astronomy, mechanical technology and seismology in China. /kloc-in 0/32, Zhang Heng invented the first seismograph in China. Zhang Heng wrote 32 books, including astronomical works "Ling County" and "Ling County Map".

Ernst Werner von Siemens (18 16- 1892), a German electrical engineer and entrepreneur, invented the motor, generator, tram and compass telegraph, improved the submarine cable, put forward the open hearth steelmaking method and innovated the steelmaking process. He was the founder of Siemens.

Alexander bell is an American inventor and entrepreneur. He obtained the patent right of the world's first available telephone (the inventor was Italian antonio meucci) and founded Bell Telephone Company (AT & amp； The predecessor of t company). Known as the "father of the telephone" by the world.

Cai Lun (the paper-making improver among the four great inventions)

Alfred bernhard nobel,1833101October 2 1 was born in Stockholm. He is a Swedish chemist, engineer, inventor, military equipment manufacturer and inventor of explosives.

Thomas Alva Edison (English name: Thomas Alva Edison, 1847-193 1), a world-famous inventor, physicist and entrepreneur, has more than 2,000 famous and important invention patents, and was awarded the title of "the wizard of Monroe Park" by the media! He was the first person in human history to use a large number of production principles and electrical engineering research laboratories to patent inventions, which had a significant and far-reaching impact on the world.

Edison has more than 2,000 inventions, including the phonograph, movie camera, tungsten lamp and so on, which have great influence on the world. In the United States, Edison has 1093 patents, while his patents in Britain, France, Germany and other places have accumulated more than 1500.

Edison is one of the famous geniuses in the history of technology, and holds 1093 invention patents for incandescent lamp, phonograph, film projector and camera. Among them, Edison's four great inventions: the phonograph, the electric light, the electric power system and the talking film have enriched and improved the civilized life of mankind.

Fulton is a famous American engineer. He built the first ship driven by a steam engine. It is 2 1.35 meters long. It successfully tested water on the Seine River in France in 1.803, but it was destroyed by a storm that night.

Morse (1791April 27th-1872 April 2nd) was born in Charleston, Massachusetts, and graduated from Yale University. He is an inventor and artist. He succeeded in inventing Morse code.

What did Watt invent, Cai Lun. And then what?

Watt invented the steam engine, Cai Lun discovered papermaking, and the Wright brothers invented the airplane.

What did Bi Sheng, Cai Lun and Du invented?

1 Bi Sheng China sculptor and inventor invented movable type printing.

Cai Lun improved papermaking in the Eastern Han Dynasty and is known as the inventor of papermaking in four great inventions of ancient china.

Du Fu's works finally had a far-reaching influence on China literature and Japanese literature. About 65,438+0,500 poems were preserved, and the collection of works was Du Gongbu Collection. His influence on China's classical poetry is far-reaching, and he is called "the sage of poetry" by later generations, and his poems are also called "the history of poetry".

Du Fu's poems are brilliant and beautiful. He is famous for his prose, especially for his beauty and elegance, and made great achievements in the late Tang Dynasty. At that time, he was called "Xiao Du"

What did Marconi, Bi Sheng, Zhang Heng, Siemens, Bell, Cai Lun, Nobel, Edison, Fulton and Morse invent?

1: Marconi: invented radio technology, radio station;

2. Bi Sheng, movable type printing;

3. Zhang Heng: Seismograph;

4. Siemens: The first product was the telegraph, which pointed out with a pointer that the alphabetical order was not Morse code.

5: Bell telephone;

6. Cai Lun: papermaking;

7. Nobel Prize: gunpowder

8. Edison: electric light ....

9. Fulton: The first ship driven by a steam engine was designed and built.

10: moss: telegram!

Is paper really invented by Cai Lun?

Don't! I'll answer!

In Four Treasures of the Study, paper appeared later than pen, ink and inkstone. Cai Lun, the eunuch in the early Eastern Han Dynasty, was recognized as the inventor of papermaking.

According to Ye Fan's Book of the Later Han Dynasty, "Cai Lun, with respect, is also a native of Guiyang. ..... Since ancient times, many book contracts have used bamboo slips, and those who use silks are called' paper'. Expensive and simple, inconvenient for people. Lennart created this idea, using bark, hemp head, our cloth and fishing nets as paper. In the first year of Yuanxing, play it. " The emperor's ability is superior, so he always uses it wisely, so the world calls it Cai Hou paper.

This is the earliest record of papermaking in historical documents. As can be seen from the records, the raw materials used for papermaking in Cai Lun are low-priced materials such as bark, hemp head, old cloth and fishing net. Therefore, the paper made by this method has low cost and will soon be popularized and applied.

But before some documents recorded Cai Lun, there were examples of using paper. For example, Ban Gu's Hanshu used paper to wrap medicine two years ago BC/KLOC-0. In particular, the paper of the Western Han Dynasty unearthed in Fangmatan, Tianshui, Gansu, the beacon tower site in Maquanwan, Dunhuang, and the post office site in Hanxuanquan, Ganquan, Dunhuang since the beginning of this century have been proved by existing physical objects that paper was used in the Western Han Dynasty long before Cai Lun invented papermaking. This is about 170 years before Cai Lun invented papermaking.

From the above, we can also see that paper was invented as early as the Western Han Dynasty. At that time, the quality of paper was so poor that it could not be used for writing. It was not until the late Western Han Dynasty that the quality of paper was improved. On the basis of this paper-making technology, Cai Lun improved the raw materials and technology, and produced high-quality paper. In particular, Cai Lun has expanded the raw materials for papermaking, providing conditions for the extensive use of various plant fibers for papermaking in the future.

What did Cai Lun invent? Anyway.

Before the invention of paper, people recorded words in various ways: ancient Sumerians wrote on clay tablets; The ancient Egyptians wrote on papyrus made of abundant aquatic plants along the Nile; Ancient Indians used birch bark and leaves as writing materials, while Europeans recorded words on sheepskin; China's books are mostly made of bamboo, which is obviously extremely heavy. Some books are made of silk, which is very expensive and not popular. It was not until Cai Lun in the Eastern Han Dynasty improved the paper-making technology and made paper with flax and fishing nets except plant fibers that the world's writing history turned a corner.

Cai Lun was a eunuch in the Eastern Han Dynasty in China, and once held an official position (he was responsible for manufacturing imperial instruments such as swords in the imperial court). He summed up the paper-making experience since the Western Han Dynasty. After numerous experiments, he finally found a cheap material-bark, rags (linen), hemp heads, fishing nets and other raw materials to extract high-quality paper. In the production process, bark, hemp head, rags, broken fishing nets, etc. are chopped or mashed, soaked in water for a certain period of time and mashed into slurry, then plant ash is added for cooking, and tree paste is added to blend into slurry, and then spread into thin slices and dried on mats. The last process is over. The original rags and fishing nets magically became soft pieces of paper. The method of making plant fiber paper from flax, fishing nets and other cheap materials is beneficial to the large-scale production of paper because of its wide source of raw materials and low price. Moreover, the paper made by this method is light and thin, which is very suitable for writing and handling and has been welcomed by people.

In the first year of Yuan Xing in the Eastern Han Dynasty (A.D. 105), Cai Lun presented a batch of high-grade paper made by him to Liu Zhao, the emperor of the Han Dynasty. Han and the emperor praised his talent and immediately ordered it to be adopted all over the world. Soon, this paper-making method spread all over the country. Cai Lun was once named Long Tinghou, and this kind of paper was also called "Cai Hou Paper" at that time. After the invention of papermaking, it greatly promoted the exchange and spread of culture. On the basis of Cai Lun's papermaking technology, later generations constantly improved papermaking technology to produce more refined paper, which spread to many countries in the world with the economic and cultural exchanges and development at home and abroad.

(I hope to adopt it, thank you)