1940-1949
1940 First successful use in the cinema of the blue chroma, in the film The thief of Baghdad. 1948 Kodak made the 35mm cellulose triacetate film. The new carrier, called safety film, would completely replace the cellulose nitrate base in a few years.
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| 1942 Introduction of colour negative film and print process. 1942 Black and white snapshot photography arrives with Polaroid.
| 1944 After the break due to the war and the German occupation, Pathé-Baby resumes its activity with a new range of cameras and projectors called "Webo" after the name of their designer Jean Wesbrodt.
1947 >> Watch video Torroella de Montgrí y su fiesta mayor. Narcís Sans. | 1940 CBS engineer Peter Carl Goldmark demonstrates a television system based on the sequential transmission of the three primary colours. The beginning of the development of colour television
| 1940 First use of stereophonic sound in a film: Walt Disney's Fantasia 1942 Helmut Krüger makes the first recordings on stereophonic magnetic tape for German radio in Berlin. 1947 John Bardeen, William Shockley and Walter Houser Brattain, researchers at the Bell Telephone Company, invent the germanium transistor. 1948 Columbia Records patents Long Play records, which spin at a speed of 33? rpm. 1949 The 45 rpm or single record appears, used by record companies to launch their new releases.
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