Kodachrome is a discontinued colorslide film. This means that it produces a positive, true-color image on the film rather than a negative like the commonC-41 film. It was made byKodak from 1935 to 2009. It had a complex developing process called K-14. It had to be developed in a lab dedicated to this process. The last lab developing Kodachrome in color closed in 2010, although there are still several labs that can develop it in black and white.

Ektachrome is a similar film that also produces a positive image, but has a much simpler development process.

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