Autochrome was the first industrial process for true colour photography. When the Lumière brothers launched it commercially in June 1907, it was a photograhic revolution - black and white came to life in colour. Autochromes consist of fine layers of microscopic grains of potato starch – dyed either red-orange, green or violet blue – combined with black carbon particles, spread over a glass plate where it is combined with a black and white photographic emulsion. All colours can be reproduced from three primary colours. To see more, click here.