The first synthetic plastic material, developed in the 1860s and 1870s from a combination of camphor and nitrocellulose. Tough, flexible, and moldable, it was used to make many mass-produced items, including photographic film for both still and motion picture cameras. Despite its flammability and tendency to discolor and crack with age, celluloid was used in motion picture production until the 1930s, when it began to be replaced by cellulose-acetate safety film.