Phototypesetting

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History of printing
Techniques Woodblock printing 200 Movable type 1040 Intaglio (printmaking) 1430 Printing press c. 1440 Etching c. 1515 Mezzotint 1642 Relief printing 1690 Aquatint 1772 Lithography 1796 Chromolithography 1837 Rotary press 1843 Hectograph 1860 Offset printing 1875 Hot metal typesetting 1884 Mimeograph 1885 Daisy wheel printing 1889 Photostat and rectigraph 1907 Screen printing 1911 Spirit duplicator 1923 Dot matrix printing 1925 Xerography 1938 Spark printing 1940 Phototypesetting 1949 Inkjet printing 1950 Dye-sublimation 1957 Laser printing 1969 Thermal printing c. 1972 Solid ink printing 1972 Thermal-transfer printing 1981 3D printing 1986 Digital printing 1991
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Phototypesetting is a method of setting type which uses photography to make columns of type on a scroll of photographic paper.^[1][2] It has been made obsolete by the popularity of the personal computer and desktop publishing which gave rise to digital typesetting.

The first phototypesetters quickly project light through a film negative of an individual character in a font, then through a lens that magnifies or reduces the size of the character onto photographic paper or film, which is collected on a spool in a light-proof canister. The paper or film is then fed into a processor, a machine that pulls the paper or film strip through two or three baths of chemicals, from which it emerges ready for paste-up or film make-up. Later phototypesetting machines used other methods, such as displaying a digitised character on a CRT screen. The results of this process are then transferred onto printing plates which are used in offset printing.

Phototypesetting offered numerous advantages over the metal type used in letterpress printing, including the lack of need to keep heavy metal type and matrices in stock, the ability to use a much wider range of fonts and graphics and to print them at any desired size, and faster page layout setting.