An FEP film is a transparent, dual-layered foil and is responsible for creating a smooth pathway for UV light to cure resin throughout the u003ca href=u0022https://3dprintingratings.com/3d-printers/lcd-3d-printers/monoprice-mini-3d-printer/u0022u003eprinting processu003c/au003e. On the other hand, an nFEP film is a specially treated foil with a clearer and smoother surface.