Around 105 CE, a Han Dynasty court official named Cai Lun is traditionally credited with a writing-material breakthrough that eventually spread worldwide. What did he actually make, and out of what?
- Paper, made by pulping materials such as tree bark, hemp waste, old rags, and fishing nets
- Silk paper, made only from surplus silk thread too short to be woven into cloth
- The first pencil, made from graphite mined near the Han Dynasty capital
- Papyrus, made by pressing together strips of a reed plant that grows along the Nile
Why A? And why not the others?
Correct answer: A. Paper, made by pulping materials such as tree bark, hemp waste, old rags, and fishing nets
Cai Lun's breakthrough was pulping cheap, widely available waste materials — macerated tree bark, hemp waste, old rags, and discarded fishing nets — into a fibrous mixture that he dried into thin sheets on bamboo frames, producing paper that was both better for writing on and far cheaper than the silk or bamboo strips used before it. That combination of quality and low cost is exactly why paper displaced older writing materials across the Han Empire and, over the following centuries, spread along trade routes to the rest of the world. The silk-paper option is a tempting trap because Chinese records do mention silk-based writing surfaces, but those predate Cai Lun's invention and were expensive precisely because they used silk rather than avoiding it. The pencil option is wrong on the timeline alone, since graphite pencils are a much later, separate European invention. The papyrus option describes a genuinely real ancient writing material, but one made by Egyptians from a Nile reed centuries earlier and through a completely different process (pressing plant strips rather than pulping fibres) — a different invention from a different civilisation.
Source: Britannica: 'Cai Lun'