Engineering grade reflective film This series of reflective film performance belongs to the fourth grade reflective film of JT-T279-1995 standard issued by the Ministry of Communications of the People's Republic of China. It is a durable sealed reflective film. This material has been successfully used to make traffic signs since the early 1950s. At present, engineering-grade reflective films still have certain applications in areas with small traffic and low-velocity motor vehicles. The engineering-grade reflective film is suitable for traffic signs on general roads, namely the usual primary, secondary, tertiary, and fourth-grade roads and signs of temporary use. Generally divided into pressure-sensitive and thermal type two. Using the same type of ink, various patterns can be made using screen printing technology. Uses: guide signs; prohibition signs, warning signs and indication signs, and signs used in ordinary advertising. Life: Generally 3 to 7 years, depending on the manufacturer. Some manufacturers only provide 7-year mark reflective film, after 7 years of brightness retention value of at least 50% of the initial brightness value. Some manufacturers provide three-, five-, and seven-year reflective films. Applicable base plate: aluminum plate, steel plate. Operating temperature: General requirements at 18 degrees Celsius to 28 degrees Celsius.