Film Area: Pick the size according to your project. Visually see the patterns of magnetic field Fun experiments and Greate Education Material !!! made from a plastic film that contains a ferromagnetic slurry of fine nickel particles that align themselves along magnetic field lines Film can be easely cut with scisors and knifes. Magnetic viewing film is also called Magnetic field display viewing film. magnetic viewing film is used to visualize magnetic fields. It is a translucent paper-like substance which makes magnetic fields visible. Most are made from a plastic film that contains a ferromagnetic slurry of fine nickel particles that align themselves along magnetic field lines. The general principle of operation is that magnetizable nickel particles are suspended in a colloidal form in a gelatinous material. This allows enough freedom for the particles to align with an externally applied magnetic field - thereby displacing the colored fluid and causing a color change at the surface of the film. Recommended for ages 8 and older.