Solar window film
Solar window film has been used to control heat within a building since the1960s.
Early films reflected the solar radiation back from a window, preventing the warming of interior surfaces, while still allowing vision through the glass.
As the concept was fine-tuned, demand developed for coloured solar control films, to complement the architectural vision. Early colours included bronze, grey, blue, green and gold.
The energy crisis of the early 1970s prompted an interest in another aspect of window film - the reduction of heat loss. It was discovered that polyester film absorbed and reradiated long wave infrared heat rather than act as a transparent medium. Through experimentation, new film materials and constructions were developed that enhanced this characteristic. These films greatly improved a room’s interior heat retention.