The Cinelux Lighting Filter, #3840 Cinebounce White/Black (20 x 24" Sheet) from Rosco is part of a series of filters created for motion picture and television productions where large lighting fixtures are employed to create effects. This filter is produced using a specialized technology that insures the longest possible life under hot theatrical lights. The filter is general mounted within a frame and placed in front of a light source to create the desired effect. The three discrete layers from which they are made are combined by a tri-extrusion process. By sealing the colored layer between two microscopically thin layers of clear film, dye migration is minimized and effective life is extended.