Definition :The ceramic film,it is named "IR film" or "absorption of the heatfilm", Strong absorption of infrared rays and ultraviolet rays by a coating layer containing ITO\ATO (metal oxide powder). The reference of the product: VLT:5%-70% IR transmission:70%-99% Thinkness:2mil Structure:2Ply Using time:7-10 years Colour:black ,blue,green The function of the producte and the using: Nona-ceramic film has a character,which is absorbing solar energy,for that reason,it has very high absorption properties of thermal solar energy,so when looking at the figure,the heat-rejection date seems very high. However,it is not the same as actually sensory temperature.Nona-ceramic product can absorb solar energy and affect to the film attached glass.At first,it makes you feel the heat-rejection effect,but as time goes by,solar heat from the hot glass re-released into the interior again,so as a result,it makes indoor much more hotter.