What was the invention of the second film revolution from black and white to color?

1939, the United States tried to shoot with high-cost color negative instead of black and white, and finally succeeded. Since then, the era of color movies has been created. 1903, Leon Didier of France invented a technology related to color printing. 1908, French Bertone invented the lens additive method, which is a method of mixing and adding the three primary colors of red, green and blue to obtain a color image. 1932, the film of the animated film "Flowers and Trees" made in Walter Disney, USA, was the first to be shot in three-color printing. 19 12 years, Fischer in Germany discovered that pigments can be produced by oxidation and coupling of some chemicals. Later, Bella Gaspar invented the color technology of decomposed film color film imaging. Kodak Company of the United States bought this technology patent in time and introduced color film.