MIL THICKNESS
Mil is the unit of measurement equal to one thousandth of an inch (.001”). Mil thickness is used in the GWF nomenclature to display the overall thickness of the window film product. 1 MIL = 25 micron
VISIBLE LIGHT TRANSMITTED (VLT)
Visible light transmitted is the ratio of visible solar energy (380 – 750nm) that passes through the glazing system to the total visible solar energy falling on the glazing system.
VISIBLE LIGHT REFLECTED (VLR)
Visible light rejected is the total percentage of visible light reflected by a glazing system that can be seen visually. GWF performance results includes Interior and exterior VLR specifications on all films.
ULTRAVIOLET REJECTED (UVR)
Ultraviolet rejected is the ratio of ultraviolet solar energy (wavelength of 300 – 380nm) that is transmitted by a glazing system to the total solar ultraviolet energy falling on the glazing system. Note: UV energy is not visible to human eye and is mainly responsible for the degration and fading of organic matter, upholstery, colors, etc.
SHADING COEFFICIENT (SC)
Shading coefficient is the ratio of the solar heat gain through a given glazing system to the solar heat gain under the same conditions for clear, unshaded double strength window glass. The lower the shading coefficient number, the better the sun control capability of the glazing system.
TOTAL SOLAR ENERGY REJECTED (TSER)
Total solar energy rejected is the percentage of incident solar energy rejected by a glazing system which is equal to solar reflectance plus the part of solar absorption which is re-radiated outward.