Line grid method

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Color slide using the Joly line grid method (1898)

A line screen process is a photographic process of color photography that works according to additive color mixing .

functionality

In the case of a photographic film that works according to the line screen process, there are dye particles in front of the emulsion layer of a black and white film , which are colored in the three additive basic colors; these particles are linear and thus - in contrast to the grain grid method - are arranged regularly and act like color filters when recording .

Examples of line screen films are:

The PolaChrome CS (ISO 40/17 °) from Polaroid is a special film for rapid development that works according to the line screen method and is processed in the Polaroid AutoProcess ( not E-6 ).

History and Development

The foundations of color photography go back to experiments by James Clerk Maxwell in 1861, which were based on the theories about the physiological basis of color perception developed by Thomas Young at the beginning of the 19th century . The first practical applications come from Louis Ducos du Hauron and Charles Cros as well as Frederic Ives (1888).

Early additive methods of color photography are the color grid plate by James W. McDonough (1892) and the line grid method by John Joly (1894).

Agfacolor , the first 35mm film for color slides using the line screen process, was brought onto the market by Agfa in 1933 .

See also

Further photographic processes after additive color mixing: