We had a truck come by from a recently shot television show to drop off a stack of mystery plastic. What initially looked like extremely flexible smoked plexiglass was actually a stack of Roscolex N9. [What, now?] In theater and film, the sheets of plastic used to color lights are called "gels". These gels are usually lightweight, comparable in weight to wax paper or overhead transparencies. In addition to affecting the color of light, certain gels are also used to shield heat, diffuse light, or reduce light intensity. To learn more about these filters, you can visit some of the most popular brands of filters: Rosco, Lee, Apollo, and Gam. [caption id="attachment_977" align="alignnone" width="494"] Crew installing 20 Roscolex N.6 panels into NBC/Telemundo’s studio, via Rosco.[/caption] Roscolex N9 is what is called a "hard gel"; like its soft counterparts, it is used to change the quality of light. These large, 1/8" thick acrylic panels reduce the intensity of light by almost 90% [or three stops, if you're a photographer]. Beyond their use in television and film, they are also frequently used in museums to reduce ambient daylight in order to protect artifacts from sun damage. These hard gels aren't cheap -- they retail for around $7 per square foot. But when you're protecting centuries-old art and artifacts or looking to create the perfect look on film, they're more than worth the price. Our 5'x6-1/2' sheets of Roscolex N9 are just $120 each [less than $4 per sq ft]. If you're interested in using them for a single project, talk to us about rentals!