Chinese Invent Paper

In 105 AD, according to the traditional account, a court official named Cai Lun presented paper to the Han emperor of China. Paper was not entirely new by then, but his version became the standard that spread across the world. It made writing cheaper, lighter, and easier to produce, and it became one of the most influential technologies in human history.

Before paper, people wrote on whatever materials were at hand. In Mesopotamia, scribes pressed marks into clay tablets, and in Egypt they used papyrus made from river reeds. In early China, writers used strips of bamboo or wood tied together with cords, and sometimes silk. Bamboo was durable but bulky, and a long book could fill a cart. Silk was light and elegant but so expensive that it was reserved for the wealthy and for special texts. Governments and scholars needed a material that was both cheap and portable.

Cai Lun served as a eunuch official in the imperial court of the Eastern Han dynasty, overseeing workshops that produced tools and weapons. Chinese records say he made paper from tree bark, hemp waste, old rags, and discarded fishing nets. The materials were soaked and pounded into a pulp, spread thinly on a fine screen, then drained and dried into a sheet. The process was inexpensive because it used scraps and plant fibers that were widely available.

Historians add an important qualification. Archaeologists have found fragments of paper in China that date to before Cai Lun's time, perhaps as early as the 2nd century BC, though many of these were probably used for wrapping rather than writing. Cai Lun is therefore best understood as someone who improved and promoted papermaking, and whose work was officially recognized, rather than as its sole inventor. His improvements helped make paper suitable for everyday writing.

Over the following centuries, paper gradually replaced bamboo and silk in China, supporting record keeping, scholarship, and the growth of the civil service. Knowledge of papermaking spread to Korea and Japan, then westward along trade routes. The Islamic world developed major paper mills, with Samarkand and Baghdad becoming important centers, and the craft reached Europe by the medieval period. Cheap paper later made the printing press practical, helping books and literacy reach far more people. Few inventions have done more to make learning widely accessible.