Autochromes

The Autochrome Lumière is an early color photography process. Patented in 1903 by the Lumière brothers in France ,it was the principal color photography process in use before the advent of subtractive color film in the mid-1930s.
Although difficult to manufacture and relatively expensive, Autochromes were relatively easy to use and were immensely popular among enthusiastic amateur photographers—at least, among those who could bear the cost and were willing to sacrifice the convenience of hand-held "snapshooting" in black-and-white. Autochromes failed to sustain the initial interest of more serious "artistic" practitioners, largely due to their inflexibility.
Autochromes continued to be produced as glass plates into the 1930s, when film-based versions were introduced, first Lumière Filmcolor sheet film in 1931, then Lumicolor roll film in 1933. Although these soon completely replaced glass plate Autochromes, their triumph was short-lived, as Kodak and Agfa soon began to produce multi-layer subtractive color films (Kodachrome and Agfacolor Neu respectively). Nevertheless, the Lumière products had a devoted following, above all in France, and their use persisted long after modern color films had become available. The final version, Alticolor, was introduced in 1952 and discontinued in 1955, marking the end of the nearly fifty-year-long public life of the Autochrome