MIL THICKNESS.
A thousandth of an inch is a derived unit of length. Equal to 0.001 inch, it is normally referred to as a thou, a thousandth, or (particularly in the United States) a mil.
PLY
A layer of material. Ply is used to display the number of separate layers of polyester film that are used in the manufacturing process to make a particular window tint product.
VISIBLE LIGHT TRANSMITTED (VLT)
The percentage of visible light (380 – 750nm) passes through a window or material.
When you choose the film, High VLT film has light color and high clarity. Otherwise, Low VLT film has Deep color like black and is hard to look inside of the car from outside.
VISIBLE LIGHT REFLECTED (VLR)
Visible light rejected is the total percentage of visible light reflected by a glazing system that can be seen visually.
Normally, metallic film has high VLR and it is glare.
SOLAR ENERGY ABSORBED
Solar energy absorbed is the ratio of the amount of total solar energy directly absorbed by the glazing system to the amount of total solar energy falling on that glazing system.
SOLAR ENERGY TRANSMITTED
Solar energy transmitted is the ratio of the total solar energy passing through the glazing system to the amount of total solar energy falling on that glazing system. The less solar energy transmitted through a glazing system, the less heat that enters.
SOLAR ENERGY REFLECTED
Solar energy reflected is the ratio of the amount of the total solar energy directly reflected by the glazing system.
Solar energy reflected is the ratio of the amount of the total solar energy directly reflected by the glazing system.
SHADING COEFFICIENT (SC)
Shading coefficient, is a value that determines one type of thermal performance of a glass unit (panel or window) in a building. It is basically the ratio of solar gain (due to direct sunlight) passing through a glass unit to the solar energy which passes through 3mm Clear Float Glass. It is referred to as an indicator to how the glass is thermally insulating (shading) the interior when there is direct sunlight on the panel or window.
Shading coefficient, is a value that determines one type of thermal performance of a glass unit (panel or window) in a building. It is basically the ratio of solar gain (due to direct sunlight) passing through a glass unit to the solar energy which passes through 3mm Clear Float Glass. It is referred to as an indicator to how the glass is thermally insulating (shading) the interior when there is direct sunlight on the panel or window.
Briefly, low SC film is more effective when you are cooling down your place in summer.
TOTAL SOLAR ENERGY REJECTED (TSER)
Total solar energy rejected is the percentage of incident solar energy rejected by a glazing system.
It is one of the most important factors when you choose the window film. High TSER means good to reduce the heat.
U-VALUE U-value is a measure of the rate of heat conductivity of a glazing system. For example, low u-value film is effective when you warm your place in winter.
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.
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.
EMISSIVITY (E) Emissivity is a measure of surface’s ability to absorb or reflect far-infrared radiation. Infrared radiation is that which is sensed by the body as heat.
SOLAR HEAT GAIN COEFFICIENT (SHGC)
Solar gain (also known as solar heat gain or passive solar gain) refers to the increase in temperature in a space, object or structure that results from solar radiation. The amount of solar gain increases with the strength of the sun, and with the ability of any intervening material to transmit or resist the radiation.
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