The Kodachrome process was invented in 1913 by John G. Capstaff for still photography and subsequently adapted to motion pictures. For the process two frames were advanced simultaneously, one located above the other. The light passed either through two lenses or through a beam-splitter, fitted with red and green filters. The release print was exposed through a beam-splitter whereby the alternate frames were projected onto either side of double-coated stock. After development by a usual b/w process, the film was tanned to harden the exposed areas. The soft areas were dyed red-orange and blue-green respectively.
-
![]()
Two-Color Kodachrome Print (USA ca. 1925 to 1927, Anonymous). Credit: George Eastman Museum. Photographs of the Kodachrome two-color double coated stock from 1925 and 1927 by Olivia Kristina Stutz, ERC Advanced Grant FilmColors.
- Source: Eggert, John (1932): Kurzer Überblick über den Stand der Farbenkinematographie. In:Bericht über den VIII. Internationalen Kongress für wissenschaftliche und angewandte Photographie, Dresden 1931, pp. 214-222. Leipzig: J. A. Barth.
- Magnification 5x. Credit: photomicrograph by Silvana Konermann.
- Magnification 10x. Credit: photomicrograph by Silvana Konermann.
- Magnification 20x. Credit: photomicrograph by Silvana Konermann.
- Kodachrome Two-color test from 1922, YouTube channel of the George Eastman House.
