halftone process

In printing, a technique of breaking up an image into a series of dots to permit reproduction of the full tone range of a photograph or artwork.

It is traditionally done by placing a glass screen printed with a tight grid of lines over the plate being exposed. The grid breaks up the image into hundreds of tiny dots, each of which is read by the camera as either black or white
or, in the case of colour art, as either a single printing colour or white. The resulting image, called a halftone, is then rephotographed for printing. Screens are made with a varying number of lines per inch, depending on the application; for newspapers the range is about 80–120, whereas glossy magazines usually require 133–175 lines per inch.

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      in printing, a technique of breaking up an image into a series of dots so as to reproduce the full tone range of a photograph or tone art work. Breaking up is usually done by a screen inserted over the plate being exposed. The screens are made with a varying number of lines per inch, depending on the application; for newspapers, the range is 50 to 85, and for magazines, 100 to 120. The highest quality reproduction requires 120 to 150 lines per inch.

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Universalium. 2010.

Look at other dictionaries:

  • Halftone process — Растрирование, фоторепродуцирование с растрированием; Растрирование; Фоторепродуцирование с растрированием …   Краткий толковый словарь по полиграфии

  • Direct halftone process — Процесс получения цветоделённых негативов непосредственно с оригиналов через светофильтры и растр …   Краткий толковый словарь по полиграфии

  • Halftone — For the music interval, see semitone. Left: Halftone dots. Right: How the human eye would see this sort of arrangement from a sufficient distance. Halftone is the reprographic technique that simulates continuous tone imagery through the use of… …   Wikipedia

  • halftone — /haf tohn , hahf /, n. 1. Also called middle tone. (in painting, drawing, graphics, photography, etc.) a value intermediate between light and dark. 2. Print. a. a process in which gradation of tone in an image is conveyed by first photographing… …   Universalium

  • process — processual /pro sesh ooh euhl/ or, esp. Brit, /proh /, adj. /pros es/; esp. Brit. /proh ses/, n., pl. processes /pros es iz, euh siz, euh seez / or, esp. Brit., /proh ses , proh seuh /, v., adj. n. 1. a systematic series of actions directed to… …   Universalium

  • halftone — /ˈhaftoʊn/ (say hahftohn) noun 1. Painting, Photography, etc. a value intermediate between high light and deep shade. 2. Photoengraving a. a process in which gradation of tone is obtained by a system of minute dots produced by a screen placed in… …   Australian English dictionary

  • process printing — [prä′ses΄] n. a method of reproducing color prints in almost any hue by the use of halftone plates in red, yellow, blue, and usually black …   English World dictionary

  • process color — noun Short for four color printing process. A printing process which uses four specific colored inks: cyan, magenta, yellow and black (CMYK), and halftone printing plates, to reproduce a range of colors. Syn: CMYK, four co, [[full process, [[full …   Wiktionary

  • halftone — half•tone [[t]ˈhæfˌtoʊn, ˈhɑf [/t]] n. 1) pht fia (in painting, drawing, graphics, photography, etc.) a value intermediate between light and dark 2) pri fia a) pri a printing process in which gradation of tone is obtained by a system of minute… …   From formal English to slang

  • halftone engraving — Synonyms and related words: albertype, book printing, chromotypography, chromotypy, chromoxylography, collotype, color printing, electronography, electrostatic printing, graphic arts, gravure, history of printing, job printing, letterpress,… …   Moby Thesaurus

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