Printing is a process for reproducing text and images, typically with ink on paper using a printing press. It is often carried out as a large-scale industrial process, and is an essential part of publishing and transaction printing.

The earliest form of printing was woodblock printing, with existing examples from China dating to before 220 A.D. and Egypt to the fourth century. Later developments in printing include the movable type, first developed by Bi Sheng in China, and the printing press, a more efficient printing process for western languages with their more limited alphabets, developed by Johannes Gutenberg in the fifteenth century.

Movable type printing

Movable type is the system of printing and typography using movable pieces of metal type, made by casting from matrices struck by letterpunches. Movable type allowed for much more flexible processes than hand copying or block printing.

Copper movable type printing originated in China at the beginning of twelfth century. It was used in large-scale printing of paper money issued by the Northern Song dynasty.

Around 1040, the first known movable type system was created in China by Bi Sheng out of porcelain. Sheng used clay type, which broke easily, but Wang Zhen later carved a more durable type from wood by 1298 C.E., and developed a complex system of revolving tables and number-association with written Chinese characters that made typesetting and printing more efficient. Still, the main method in use there remained woodblock printing (xylography), which “proved to be cheaper and more efficient for printing Chinese, with its thousands of characters”.

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