<P> The idea of halftone printing originates from William Fox Talbot . In the early 1850s he suggested using "photographic screens or veils" in connection with a photographic intaglio process . </P> <P> Several different kinds of screens were proposed during the following decades, but the first half - tone photo - engraving process was invented by Canadians George - Édouard Desbarats and William Leggo Jr. (4) On October 30, 1869, Desbarats published the Canadian Illustrated News which became the world's first periodical to successfully employ this photo - mechanical technique; featuring a full page half - tone image of His Royal Highness Prince Arthur, from a photograph by Notman. (5) Ambitious to exploit a much larger circulation, Debarats and Leggo went to New York and launched the New York Daily Graphic in March 1873, which became the world's first illustrated daily . </P> <P> The first truly successful commercial method was patented by Frederic Ives of Philadelphia in 1881 . But although he found a way of breaking up the image into dots of varying sizes he did not make use of a screen . In 1882 the German George Meisenbach patented a halftone process in England . His invention was based on the previous ideas of Berchtold and Swan . He used single lined screens which were turned during exposure to produce cross-lined effects . He was the first to achieve any commercial success with relief halftones . </P> <P> Xerography (or electrophotography) is a photocopying technique developed by Chester Carlson in 1938 and patented on October 6, 1942 . He received U.S. Patent 2,297,691 for his invention . The name xerography came from the Greek radicals xeros (dry) and graphos (writing), because there are no liquid chemicals involved in the process, unlike earlier reproduction techniques like cyanotype . </P>

Screenprinting is a faster more efficient form of which printmaking technique