Emile Cohl - Fantasmagorie 1908

To make this film, Cohl placed each drawing on an illuminated glass plate and then traced the next drawing-with variations-on top of it until he had some 700 drawings. In 1908, chalkboard caricaturists were common vaudeville attractions and the characters in the film look as though they've been drawn on a chalkboard, but it's an illusion. By filming black lines on paper and then printing in negative Cohl makes his animations appear to be chalk drawings.