The Finlay colour process was an early
additive
Additive may refer to:
Mathematics
* Additive function, a function in number theory
* Additive map, a function that preserves the addition operation
* Additive set-functionn see Sigma additivity
* Additive category, a preadditive category with f ...
colour photography process devised by an Irish woman named Clare Elizabeth Finlay which could produce a picture in natural colour with a single exposure.
Description
The Finlay colour process was based on the theory of scientist
Clerk Maxwell, who discovered in 1861 that all the colours in nature could be matched by the proper admixture of the three primary colours.
[http://www.oldandsold.com/articles21/color-photography-12.shtml] It was on this principle that Mr. Finlay made a screen of geometric pattern comprising red, green and blue-violet squares in regular sequence. Patented by Finlay in 1906 and introduced in 1908 as the "Thames Colour Screen". It used a screen with a precise checkerboard of red, green, and blue elements as opposed to the random mosaic pattern used in the
Autochrome system. This separate screen could be used with any type of
panchromatic
Panchromatic emulsion is a type of black-and-white photographic emulsion that is sensitive to all wavelengths of visible light.
Description
A panchromatic emulsion renders a realistic reproduction of a scene as it appears to the human eye, altho ...
film or
photographic plate
Photographic plates preceded photographic film as a capture medium in photography, and were still used in some communities up until the late 20th century. The light-sensitive emulsion of silver salts was coated on a glass plate, typically thinn ...
to make a colour
photograph
A photograph (also known as a photo, image, or picture) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, such as a CCD or a CMOS chip. Most photographs are now create ...
.
In 1909 the "Thames Colour Plate" was released, which incorporated the filter screen and the emulsion in a single plate.
Both processes were abandoned after
World War I
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
, but improved versions were marketed under the name of Finlay Colour in 1929 and 1931. They were major rivals to
Dufaycolor until the introduction of the subtractive materials in the mid-1930s.
See also
*
Finlaycolor Finlaycolor was an early color photography process.
In ''Uncle Tungsten,'' Oliver Sacks reminisces:
See also
* Finlay colour process
*History of photography
*List of photographic processes
A list of photographic processing techniques.
Color
*A ...
*
Paget process
The Paget process was an early colour photography process patented in Britain in 1912 by G.S. Whitfield and first marketed by the Paget Prize Plate Company in 1913. A paper-based Paget process was also briefly sold. Both were discontinued in the ...
Notes
Photographic processes
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