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 photography. For many years Kodachrome was widely used for professional color photography, especially for images intended for publication in print media. Because of its complex processing requirements, the film was sold process-paid in the United States until 1954, when a legal ruling prohibited that. However, the arrangement continued in other markets.
Due to the growth and popularity of alternative photographic materials, its complex processing requirements, and the widespread transition to digital photography, Kodachrome lost market share. Its manufacture was discontinued in 2009, and processing ended in December 2010.