13/07/2018
UNDERSTANDING VISIBLE LIGHT TRANSMISSION (VLT)
Car window tinting films are measured in visible light transmission levels (also known as VLT), and these levels are represented as a percentage of the visible light transmitted through the windows. So, when you see a window film being referred to as a percentage, this is the VLT. βLetβs do 35% on the back windows,β means 35% of the visible light will pass through the window film.
In the simplest terms, the lower the percentage, the darker the window film will be. A 5% VLT film is very dark as it only lets though 5% of visible light and a 70% film is very light as it lets through 70%. There is, however, one little complication, and that is that windows as installed by the factory do not allow 100% of light to pass through. Most auto makers very slightly tint their glass, usually with a VLT of about 80%.
So how do you calculate the true VLT of your windows?
To calculate the actual VLT of the glass with film applied to it, you need to multiply the VLT of the window tint applied by the VLT of the glass. For example, applying a 5% film to glass with an 80% tint to it, you would multiply 5% x 80% = (0.05Γ0.80)x100 = 4%. So the glass and window tint would have a combined VLT of 4%.
Contact Tint Direct Sydney now to find the most suitable window film for your car π