Magnetic Viewing Film (MagFilm) is a film which allows for magnetic domain visualization. When placed on a magnet you will be able to see direction of the magnetic field. MagFilm can be used to find magnets hidden in materials, or just to see the extent of a magnets reach. Amazing Magnets also sells HD-MagFilm for a slightly higher price, and it is a high-resolution film which provides a higher resolution view. MagFilm (Green Viewing Film) works the same way as the HD-MagFilm, however the resolution is not quite as detailed. When exposed both films will change colors, and will retain most of the image after the magnet has been moved away from the film. To clear the film, you must pass another magnet near the film, not touching it.