Origins and the Cai Lun tradition
Chinese historical accounts credit an official of the Han court named Cai Lun with presenting an improved papermaking process in about 105 CE. He is often described as the inventor of paper. The accurate picture is more complicated. Archaeologists have found fragments of paper-like material in China that are usually dated earlier than 105, including some from the second century BCE, though dating and classification of the oldest pieces are debated. A reasonable summary is that paper developed in China over a period, and Cai Lun is associated with an important refinement and its adoption at court rather than with a single moment of invention.
Early paper was used for wrapping and padding as well as writing. Silk and bamboo strips were the main writing surfaces before it, and paper took time to replace them. Over the following centuries it became widely used for books, documents and art.
How traditional paper was made
The core idea has barely changed. Paper is a mat of fibers that have been separated, suspended in water and caught on a screen. In traditional Chinese practice, the fibers came from the inner bark of trees such as mulberry, from hemp, and from worn rags and fishing nets, and later from bamboo and rice straw in some regions.
A typical sequence ran like this:
- The raw material was soaked and often cooked with an alkali such as lime or ash to soften it.
- The softened fiber was pounded or beaten into a pulp.
- The pulp was diluted in a vat of water. A mold with a fine screen was dipped in and lifted out, leaving a thin layer of fibers.
- The wet sheet was turned out onto a pile, pressed to squeeze out water, and dried, often against a flat surface.
The skill lay in the details, such as how thoroughly the pulp was beaten, how evenly the water drained, and what additives helped. Some papermakers treated sheets with starch or other sizing to reduce ink bleeding, and some added plant extracts to resist insects, though techniques varied by place and period.
East Asia first
Knowledge of papermaking moved to neighboring regions first. Korea and Japan adopted it in the early centuries of the first millennium CE, and a traditional date of 610 is often cited for the craft reaching Japan, though such dates are approximate. Each region adapted the process to local fibers, which is part of the reason East Asian papers differ in texture and appearance.
Westward across Asia
The route west is less clear than the stories suggest. A widely repeated account says that Chinese papermakers captured after a battle near the Talas River in 751 taught the craft in Samarkand. Many historians treat this as a plausible but uncertain tradition, because papermaking may have been moving along trade routes already. What is better documented is that paper was being made in Central Asia and in the Abbasid world by the late eighth century, with Baghdad becoming a notable center.
In these regions, makers relied heavily on linen and other rag fibers rather than bark. Paper offered the expanding administration and the book trade a cheaper material than parchment, and paper mills powered by water mills later appeared in parts of the Islamic world. From there the craft traveled through Egypt and North Africa.
Into Europe
Paper reached Europe through Muslim Spain and through trade with the Mediterranean. Paper making in Xàtiva in Spain is often noted for the eleventh or twelfth century. By the later thirteenth century, Fabriano in Italy had become famous for its mills, and techniques associated with it, such as using gelatin sizing and watermarks, are commonly highlighted. In the following centuries, paper manufacture spread to France, the German lands and the Netherlands. England was later, with commercial production usually dated to the late fifteenth century.
Why was Europe slow? Parchment was familiar and trusted, and some officials and scribes distrusted paper’s durability. Rags, the main raw material, also had to be collected in quantity. Paper became decisive once printing with movable type created demand for large volumes of cheap sheets.
What paper changed
Paper lowered the price of writing and made longer documents, letters and records more practical. It supported bureaucracies in China and the Islamic world and later fueled print shops in Europe. Its manufacture, though, stayed a hand craft for a very long time, dependent on rags and on labor, until machines changed the economics in the nineteenth century.