GBC NAP I thermal laminating roll film for use with heated roller and heat shoe laminators. 1" poly-in core. Choose the right film for the job. Nap I film is the most common type of school lamination roll film and is ideal for everyday projects. Keep your documents bright and bold. Glossy film has a whiny finish that helps emphasize colors. Load film into your laminator using patented, lightweight AutoGrip shafts or traditional steel shafts, which utilize thumb screws and core chucks.