Technicolor three-colour 35mm camera, c 1955.
© National Media Museum / Science & Society Picture Library
Technicolor was introduced in 1915 and is widely regarded as the finest colour motion picture proces. It evolved through four versions, culminating in the three-colour camera. This used a beam splitter and red, green and blue filters to record colours as primaries on three separate monochrome films. Subsequently, each negative was reproduced in its appropriate dye colour on the print.