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During development, the exposed silver salts are converted to metallic silver, just as with black-and-white film. But in a color film, the by-products of the development reaction simultaneously combine with chemicals known as color couplers that are included either in the film itself or in the developer solution to form colored dyes.
A strip of four color negatives on 35 mm film that show some images of what looks like a fire hydrant, street lights etc. Film for cameras that use the 35 mm still format is sold as a long strip of emulsion-coated and perforated plastic spooled in a light-tight cassette.
In his feature film The Aviator (2005), Martin Scorsese seamlessly blended colorized stock footage of the Hell's Angels movie premiere with footage of the premiere's reenactment. The colorization by Legend Films was designed to look like normal three-strip film but was then color corrected to match the two-strip look of the premiere's reenactment.
[50] 1936 also saw the launch of Agfa Color Neu, the first subtractive three-color reversal film for movie and still camera use to incorporate color dye couplers, which could be processed at the same time by a single color developer. The film had some 278 patents. [51] The incorporation of color couplers formed the basis of subsequent color ...
Two frames of a vertical filmstrip take up roughly the same amount of space as a single frame on the horizontal. Including its guard band, a vertical filmstrip could contain up to 64 images, while a horizontal oriented strip usually contained 32 images. This is based on the equivalent of a 25 exposure length of 35mm still camera film.
The matrices, which are relief gelatine images on a film support (one for each subtractive primary color) absorb dye in proportion to the optical densities of the gelatin relief image. Successive placement of the dyed film matrices, one at a time, "transfers" each primary dye by physical contact from the matrix to a mordanted, gelatin-coated ...
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The front film is orthochromatic, to record the blue-green portion of the picture. On the surface of its emulsion is a red-dye layer equivalent to a Wratten 23A filter. The rear film is panchromatic, and being photographed through the red coating of the front film, records only the red-orange components of the picture. No filtering is necessary ...