Reflective film, is made of a thin film of retroreflective materials can be used. Using glass bead technology, micro-Prism technology, synthetic resin technology, film technology and coating technology and micro-replication technology. Usually white, yellow, red, green, blue, Brown, Orange, fluorescent yellow, fluorescent orange, fluorescent yellow-green, abroad as well as fluorescent pink and fluorescent red. In 1937, the world's first reflective film in the United States was born of a laboratory. Is the starting point of traffic signs used reflective film history. In 1939, the United States Minnesota road, in the open air under the conditions of use for the first time a piece made of reflective signs, from now on, unveiled a new series of reflective products for traffic signs, created a new traffic safety industry.