Printing press

A printing press works by pressing an inked surface against material like paper or cloth to transfer the image. This machine was a huge leap forward from older methods, where ink was put on the printing surface and then rubbed onto paper by hand. Its creation and spread around the world changed how books were made and how people communicated in the early modern period, kicking off an age of mass communication that transformed European society.

Around 1440, a goldsmith named Johannes Gutenberg came up with a way to mass-produce movable type for a printing press, sparking the Printing Revolution in Europe. He based his design on the screw presses that were already common at the time. By about 1600, a European press could turn out up to 3,600 impressions in a 15-hour workday. For comparison, woodblock printing managed 1,500 to 2,000 double sheets a day, while Korean metal movable type produced only 40 sheets. Gutenberg’s hand mold made it possible to cast metal type quickly and in large quantities. From the city of Mainz, the press spread to roughly 270 cities across Europe within a few decades, and by 1500, Western European presses had printed more than twenty million copies.

This spread of printing brought mass communication, which reshaped European society. Information flowed more freely across borders, helped the Reformation spread rapidly across the continent, and supported the exchange of ideas that fueled the Scientific Revolution. Printed texts became cheaper and easier to get than handwritten manuscripts, and adult literacy rates rose at different speeds across Europe. As books started appearing in local languages instead of Latin, print helped standardize the spelling and grammar of national languages.

For more than three hundred years, the basic design of the wooden handpress stayed pretty much the same, until the Industrial Revolution. By 1800, Lord Stanhope built the first iron printing press, which could print a whole sheet with a single pull. In the 1810s, Friedrich Koenig added steam power and rotating cylinders, and *The Times* newspaper started using his presses in 1814. Richard M. Hoe’s rotary printing press, introduced in 1843, allowed for much higher output; later rotary presses could produce millions of page impressions in a day. During the twentieth century, offset printing, phototypesetting, and digital printing mostly replaced letterpress for commercial work.

Gutenberg developed his movable-type printing press around 1440 by combining four technologies that had each matured by the mid-fifteenth century: the screw press, movable type, the codex book format, and mechanized paper production. The economic and cultural changes of late medieval Europe helped create conditions where his press could succeed commercially. The growth of trade and commerce had expanded the urban middle class, and the rising number of universities from the twelfth century onward increased demand for books. Hand-copying was slow and expensive, and by the fifteenth century, the supply of manuscripts fell far short of this growing demand.

Gutenberg integrated these four technologies into a single working system and added his own innovations, including a hand mold for casting type and an oil-based ink that worked well with metal type. The first technology was the screw press, which applied direct pressure on a flat plane. It was already ancient in Gutenberg’s time and used for many tasks. Introduced by the Romans in the 1st century AD, it was commonly used in agriculture for pressing grapes for wine and olives for oil. Gutenberg may also have been inspired by paper presses that had spread through German lands since the late 14th century, which worked on the same mechanical principles.

Gutenberg adopted the basic design, thereby mechanizing the printing process. But printing placed different demands on the machine. He adapted the construction so that the pressing power from the platen on the paper was applied evenly and with minimal smearing. To speed things up, he introduced a movable undertable with a flat surface where sheets could be changed quickly.

The second element was movable type—the idea of composing a text from individual reusable characters. The first movable type was invented by the Chinese artisan Bi Sheng in the 11th century during the Song dynasty, using characters made of baked clay. Around 1300, Wang Zhen developed a set of movable wooden type arranged on revolving tables, which he used to print a local gazetteer and described in his agricultural treatise. Woodblock printing remained the dominant technique in East Asia. The oldest surviving book printed with metal movable type is the *Jikji*, produced in Korea in 1377 during the Goryeo era. However, the various techniques used—imprinting, punching, and assembling individual letters—lacked the refinement and efficiency needed for wide acceptance. In China, movable type saw limited use, partly because a logographic script required many thousands of separate characters, making a full set of type costly. Gutenberg’s use of the Latin alphabet was a practical advantage here, since it allowed the typesetter to represent any text with a relatively small set of characters.

The third element was the codex book format, which had originated in the Roman period. It is considered the most important advance in the history of the book before printing.