Cai Lun

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Cai Lun (simplified Chinese: 蔡伦; traditional Chinese: 蔡倫; pinyin: Cài Lún; Wade–Giles: T'sai Lun) (ca. 50 AD – 121), courtesy name Jingzhong (敬仲), was a Chinese eunuch. He is traditionally regarded as the inventor of paper and the papermaking process, in forms recognizable in modern times as paper (as opposed to Egyptian papyrus). Although paper existed in China before Cai Lun (since the 2nd century BC),[1] he was responsible for the first significant improvement and standardization of paper-making by adding essential new materials into its composition.[2]



Cai Lun (蔡伦) was born in Guiyang (modern day Leiyang, Hunan) during the Eastern Han Dynasty. After serving as a court eunuch from AD 75, he was given several promotions under the rule of Emperor He of Han. In AD 89 he was promoted with the title of Shang Fang Si, an office in charge of manufacturing instruments and weapons; he also became a Regular Palace Attendant (中常侍).[3] He was involved in palace intrigue as a supporter of Empress Dou, and in the death of her romantic rival, Consort Song.[4] After the death of Empress Dou in AD 97, he became an associate of Consort Deng Sui.

In AD 105, Cai invented the composition for paper along with the papermaking process - though he may have been credited with an invention of someone from a lower class.[5] Tools and machinery of papermaking in modern times may be more complex, but they still employ the ancient technique of felted sheets of fiber suspended in water, draining of the water, and then drying into a thin matted sheet.[6] For this invention Cai would be world-renowned posthumously, and even in his own time he was given recognition for his invention. A part of his official biography written later in China read thus (Wade-Giles spelling):

As listed above, the papermaking process included the use of materials like bark, hemp, silk, and fishing net; his exact formula has been lost. Emperor He was pleased with the invention and granted Cai an aristocratic title and great wealth.

In 121, Consort Song's grandson Emperor An of Han assumed power after Empress Deng's death and Cai was ordered to report to prison. Before he was to report, he committed suicide by drinking poison after taking a bath and dressing in fine silk robes.Will Durant, The Story of Civilization: Our Oriental Heritage, Chapter XXV-The Age of the Artists, part 2 (The Revival of Learning) Cai was later revered in Chinese ancestor worship. Fei Zhu of the later Song Dynasty (960-1279) wrote that a temple in honor of Cai Lun had been erected in Chengdu, where several hundred families involved in the papermaking industry traveled five miles from the south to come and pay respects.[7]

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