Technicolor is the trademark name of a process that filmed color in movies between 1922 and 1952, including the famous movie, The Wizard of Oz. This process involved the recording of scenes to multiple black-and-white negatives. Each negative is exposed to only one of the primary colors which was used, red, blue, or green (although until 1932, only two colors were used). These negative films are then printed to positives, which are then died red, blue, or green, according to the color lens used. Finally, all three positives are transferred onto another film, which is the final product. For the time, this method produced high-quality color, but was a slow, laborious task. For this reason it was only initially used in high-budget films.
Technicolor was developed by an American named Herbert T. Kalmus. It was first used for a full-length feature in 1917--a movie which was called The Gulf Between.
- The World Book Encyclopedia, 2001. Vol. 19. Chicago: World Book, 2001. Print. (pp 73)