Duratran Transparency can be used in any light box that illuminates the graphic from behind. Our back-lit film is a premium, high quality media intended for maximum image performance. The 8 mil, front-print, polyester transparency film has an ultra absorbent coating that is designed to produce the best black density and color vibrancy. The ink absorption capabilities for this transparency media offer a color saturated visual experience that is absolutely vibrant. More Images.