Question

Although the first permanent colour photo was taken in 1861 by the Scottish physicist James Clerk Maxwell, the first 35mm colour film, "Kodachrome", did not reach the market until when?

Answer 1

1936
In 1861 Maxwell presented the first colour photograph by photographing a tartan ribbon 3 times, each time with a different colour filter over the lens. As colour transparencies they were projected with 3 different projectors, each equipped with the same colour filter used to take its image. The three images formed a full colour image.