Bi Sheng, a Song dynasty craftsman, is usually credited with the earliest known movable type system, around 1040 CE. He carved individual characters from clay or porcelain and arranged them on a frame to compose pages, then pressed inked characters onto paper. This innovation grew out of a printing landscape dominated by woodblocks, yet the scale of the Chinese script—tens of thousands of characters—made full replication with carved blocks impractical. Bi Sheng’s approach separated symbol from page, enabling reuse of characters, a transformative idea that would resurface in distant Europe only centuries later.

Nearly three centuries later, Korea advanced the idea with metal movable type. In the 13th–14th centuries Korean artisans produced durable metal matrices, expanding the range and resilience of type. The Jikji, compiled in 1377 by the Buddhist monk Baegun, is the best-known artifact of this era: the oldest surviving book printed with movable metal type. It predates Gutenberg’s Bible by about seventy years and reveals a parallel track of printing innovation in a different corner of Asia that shaped later literacy and knowledge networks.

Jikji’s production illustrates how metal type could sustain longer runs than fragile ceramic blocks, enabling repeated printing of multiple texts. Unlike the block-driven traditions of nearby Cultural spheres, Korea’s metal matrices could be mounted and rearranged with relative speed, even as many households still relied on hand copying for most works. The diffusion of metal type across East Asia faced material and economic constraints: casting thousands of distinct characters required heavy investment and specialized mastery.

Taken together, these early experiments map a broader pattern in world printing: innovations cluster locally yet diverge in form and adoption. Bi Sheng’s clay typography anticipated a universal concept—reusable type—while Jikji demonstrates how metal type could emerge in response to distinct linguistic and religious needs. The story of movable type thus shows multiple trajectories, converging only later in a shared global habit of printed knowledge.