Technicolor

This process has been widely used in Hollywood from 1922 to 1952. The director Léonce Perret was the first, in France, to use this technic for his films from 1927.
This technic was often used for musicals (as Singing in the rain) and animated movies (as Snow White and the Seven Dwarfs and Fantasia); Technicolor’s process has become famous for his rendering hyper-realistic.
Technicolor uses the shooting of black and white film, the shipper contains three films each receiving which one of three primary colors, whose separation is performed by filters placed behind the aim.
This process hasn’t been used since the 70s and was replaced by Eastmancolor which was invented by Kodak.