In the motion picture industry a China Girl is an image of a woman accompanied by color bars that appears for a few frames (typically one to four) in the reel leader. A "China Girl" was used by the lab technician for calibration purposes when processing the film (with the still photography equivalent being a "Shirley Card"). The origin of the term is a matter of some dispute but is usually accepted to be a reference to the models used to create the frames - either they were actually china (porcelain) mannequins, or the make-up worn by the live models made them appear to be mannequins.
