THE PRINTING PRESS

By the middle of the 15th century several print masters were on the verge of perfecting the techniques of printing with movable metal type. The first man to demonstrate the practicability of movable type was Johannes Gutenberg (c.1398-1468), the son of a noble family of Mainz, Germany. A former stonecutter and goldsmith, Gutenberg devised an alloy of lead, tin and antinomy that would melt at low temperature, cast well in the die, and be durable in the press. It was then possible to use and reuse the separate pieces of type, as long as the metal in which they were cast did not wear down, simply by arranging them in the desired order. The mirror image of each letter (rather than entire words or phrases), was carved in relief on a small block. Individual letters, easily movable, were put together to form words; words separated by blank spaces formed lines of type; and lines of type were brought together to make up a page. Since letters could be arranged into any format, an infinite variety of texts could be printed by reusing and resetting the type.

By 1452, with the aid of borrowed money, Gutenberg began his famous Bible project. Two hundred copies of the two-volume Gutenberg Bible were printed, a small number of which were printed on vellum. The expensive and beautiful Bibles were completed and sold at the 1455 Frankfurt Book Fair, and cost the equivalent of three years' pay for the average clerk. Roughly fifty of all Gutenberg Bibles survive today.