Cai Lun (c. 48 - 121) was a Chinese court official and eunuch of the Han dynasty who is traditionally credited with inventing paper and the papermaking process. [1] Around 105 CE he presented to Emperor He an improved method of making a writing surface from tree bark, hemp, rags, and fishing nets, producing a material cheaper and more practical than silk or bamboo. [1] Although archaeological finds show that paper existed in China before his lifetime, Cai Lun is credited with refining and standardizing the technique that later spread across the world. [2]
Background and court career
Cai Lun was born in Leiyang, in what is now Hunan province, during the Eastern Han dynasty. [1] He entered the imperial palace as a eunuch around 75 CE and rose through a series of appointments at the court in the capital, Luoyang. [1] By the reign of Emperor He he had become a trusted official, eventually taking charge of the imperial workshops that produced instruments and weapons for the state, a post that placed him at the centre of the court's technical craftsmanship. [2]
The invention of paper
In 105 CE Cai Lun reported to the throne a method for producing paper from inexpensive and readily available materials, including mulberry and other tree bark, hemp waste, worn rags, and old fishing nets. [1] These fibres were soaked, pounded into a pulp, suspended in water, and lifted out on a screen to dry into thin, even sheets. [3] The resulting material was lighter and far less costly than the silk and heavy bamboo strips then used for writing, and it made the keeping of records far more practical. [3] For this achievement he was rewarded by the court and later ennobled as a marquis. [1]
Later life and death
Cai Lun's fortunes were tied to the shifting alliances of the imperial household. He had earlier taken part in palace intrigues surrounding the succession, and after his patrons lost power he was ordered to submit himself for investigation. [1] Rather than face trial, he is said to have bathed, dressed in fine robes, and taken poison, dying in 121 CE. [2]
Legacy
Modern scholarship recognizes that paper existed in China before Cai Lun, so he is now regarded as the figure who improved and popularized papermaking rather than its sole originator. [1] Even so, his standardized process became the foundation of an industry that spread through East Asia, the Islamic world, and eventually Europe over the following centuries. [3] Papermaking is counted among the Four Great Inventions of ancient China, and Cai Lun has long been honoured as its patron, remembered in temples and ranked among the most influential figures in world history. [4]
