In printing and typography, hot metal typesetting is a technology for typesetting text in letterpress printing. This method injects molten type metal into a mold that has the shape of one or more glyphs. The resulting sorts or slugs are later used to press ink onto paper. Normally the typecasting machine would be controlled by a keyboard or by a paper tape.
A Monotype composition case showing bronze matrices struck from steel punches
Printing is a process for mass reproducing text and images using a master form or template. The earliest non-paper products involving printing include cylinder seals and objects such as the Cyrus Cylinder and the Cylinders of Nabonidus. The earliest known form of printing evolved from ink rubbings made on paper or cloth from texts on stone tablets, used during the sixth century. Printing by pressing an inked image onto paper appeared later that century. Later developments in printing technology include the movable type invented by Bi Sheng around 1040 AD and the printing press invented by Johannes Gutenberg in the 15th century. The technology of printing played a key role in the development of the Renaissance and the Scientific Revolution and laid the material basis for the modern knowledge-based economy and the spread of learning to the masses.
The intricate frontispiece of the Diamond Sutra from Tang dynasty China, AD 868 (British Library), discovered at the Library Cave of Mogao Caves in Dunhuang, but probably printed in Sichuan.
The earliest known woodcut, 1423, Buxheim, with hand-colouring
Copperplate of 1215–1216 5000 cash paper money with ten bronze movable types
Jikji, "Selected Teachings of Buddhist Sages and Son Masters" from Korea, the earliest known book printed with movable metal type, 1377. Bibliothèque Nationale de France, Paris