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105 CEReputable source · 2 sourcesWell documented

Cai Lun Refines Papermaking

A Han court official turns plant fiber waste into a cheap new writing material

On the timeline · around 105 CE · Empire and Golden AgesEmpire and Golden AgesCai Lun Refines Papermaking200 BCE100 BCE1 CE100 CE200 CE300 CE400 CE

Quick facts

Traditional date
105 CE
Credited inventor
Cai Lun, Imperial Workshops, Luoyang
Materials
Bark, hemp waste, rags, fishnets
Earlier fragment
Western Han-era paper found in Gansu, 1986

What happened

In 105 CE, Cai Lun, director of the Imperial Workshops at Luoyang, is traditionally credited with creating an improved paper by soaking and pressing plant fibers, including bark, hemp waste, old rags, and fishnets, then drying the resulting pulp in sheets on wooden frames or screens. The resulting material proved better for writing than the silk cloth then in common use and was far cheaper to produce, since it drew on abundant, low-cost raw materials rather than expensive silk or cumbersome bamboo strips. A fragment of paper recovered in 1986 from a Gansu tomb, dated to the early Western Han, shows paper existed in a cruder form generations before Cai Lun, apparently used for wrapping rather than writing; his contribution was a refined, standardized process rather than the material's first appearance.

Why it matters

Cheap, high-quality paper let written records, administration, and scholarship spread far beyond the elite who could afford silk, and the technology eventually traveled west along the Silk Road and reshaped record-keeping and book production across Eurasia. Within China, paper directly enabled the later development of woodblock printing during the Tang dynasty.

How we know

The traditional 105 CE date and Cai Lun's role are recorded in the Hou Han Shu (History of the Later Han), compiled not long after his lifetime; the earlier Gansu paper fragment, showing a map with topographical ink markings, was recovered archaeologically in 1986.

Sources

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