Carbon film doesn’t have any metal in it, so the issue with cell phones and radio transmission doesn’t arise when it is used (metallic window tint). Carbon window-tinting film is dark and matte-finished, so it provides a tasteful option on windows. The carbon content of the film blocks about 40% of the infrared light (the kind that causes warmth) that enters through the windows. Carbon window-tinting film is about as effective as other varieties in blocking heat; its use will effectively cool inside space while also helping prevent fading to upholstery. In turn, the air conditioning will not need to work so hard to cool the space during the summer, nor will the heating system be so heavily impacted during the winter. Unlike dyed film, carbon film will not fade with time. Ceramic film is the highest quality of window tint film, and also the most expensive, contains neither metal, dye, nor carbon, but instead a kind of ceramic particle that is both nonconductive and nonmetallic. Ceramic film has only recently appeared on the market, but has already proven it's worth in terms of performance and reliability. Ceramic window-tinting film cuts from 45% to 50% of the solar heat that enters through the windows in the form of infrared light, while allowing maximum visibility both by day and night. Like carbon film, ceramic window-tinting film allows maximum efficiency in the functioning of radios, cell phones, GPS systems, and all other such devices being operated from inside the protected space. It surpasses the other types in its resistance to glare and fading, and it also renders windows highly shatter-proof. Ceramic film is most effective in its ability to blocking of ultraviolet light from the interior; in the case of ultraviolet light (the kind of light rays that contribute to sunburn and skin cancer), ceramic window-tinting film can block up to 99% from entering the interior.