film developing history: colour

Like sound, some early silent films have accompaniment, some early films also have colour. Some directors abandon the natural style and colour cinefilm to show sentiment. When the sound is used to reinforce and supply scenes, the way which colour the cinefilm is over, the main reason is that to colour cinefilm can not ensure the quality of sound record. The early colour film appears in the 1930s, but sounds like sound technology, the great economic depression makes the finance unsteadiness. Until the end of 1950s, colour is used abroad and can be defined a enormous and attractive factor in the film. Of course, it can not be ignore the fact that Eastman Kodak invented Eastman colour film in the 1950s. In my opinion, sound should be used like sound to intensify the film's inner beauty and show the emotion. The Wonderful Wizard of Oz is a classical example in 1939.in this film, the black and white background of Kansas is changed vivid and colourful.