Film stock is a type of photographic film that is used for recording motion pictures or animation. It is recorded on by a movie camera, developed, edited, and projected onto a screen using a movie projector.
Photographic film consists of a long strip of transparent plastic film base, coated on one side with a photographic emulsion: a mixture of gelatin and microscopic light-sensitive silver halide crystals. A very short exposure is made, producing an invisible latent image in the emulsion, which can be chemically developed into a visible photograph.