Kodachrome is the brand name for a color reversal film introduced by Eastman Kodak in 1935. It was one of the first successful color materials and was used for both cinematography and still photograph
Kodachrome K135 20 Color Reversal film
Kodachrome II – film for color slides; the 35mm still photography format is shown above
Ciné-Kodak Kodachrome 8mm movie film (expired May 1946)
The E-6 process is a chromogenic photographic process for developing Ektachrome, Fujichrome and other color reversal photographic film.
An example of slide film requiring development using the E-6 process
The E-6 process results in positive images that can be mounted and presented as slides