This abstract film was Len Lye's first experiment with painting in colour directly onto celluloid. The material was processed in Dufaycolor for its initial release in 1935. John Grierson acquired it for the GPO and reissued it with the addition of a 'cheaper parcel post' message in 1937. The limitations of Dufaycolor mean that it could not reproduce the colours Lye had painted on the film but this is what audiences of the time would have seen. As part of the preservation process, the National Film and Television Archive used the original hand-painted nitrate print to create an Eastmancolor negative and print to capture the colours used by Lye. Both the Dufaycolor and the copy from Lye's original appear on EMOL.