Film stock
![A film strip](/Images/godic/202501/13/Film_strip2450.jpg")
![A silent home movie on 16mm black-and-white reversal double perforation film stock](/Images/godic/202501/13/16mmBWrevDP2450.png")
![A short strip of undeveloped 35 mm color negative film.](/Images/godic/202501/13/35mm-undevel2451.jpg")
![35 mm film print frames. At far left and far right, outside the perforations, is the SDDS soundtrack as an image of a digital signal. Between the perforations is the Dolby Digital soundtrack (note the tiny Dolby](/Images/godic/202501/13/Anamorphic-digital_sound2451.jpg")
Film stock is an analog medium that is used for recording motion pictures or animations. It is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast and resolution of the film.