Window tinting movies are measured in seen gentle transmission ranges (or VLT). Which means that once we talk about a specific movie, be it for becoming to a automotive or some other software, we usually confer with it with it is VLT worth. VLT is measured in share ( % ), so in the event you hear a couple of tint product being known as a share, it’s the VLT that defines that share worth.
For instance, a tinting movie known as Charcoal 5% is a charcoal colored tint with a VLT of 5% and likewise a movie known as inexperienced 50% is a inexperienced colored tint movie with a VLT of 50%. However what does the quantity really imply?
Nicely, in easy phrases the VLT worth is the share of seen gentle that shall be allowed to journey by the window tinting movie from the outside face aspect of the movie to the inside aspect. Which means that a 5% movie will solely permit 5% gentle journey by and a 70% movie will permit 70% gentle to journey. In impact, which means that decrease VLT movies will seem darker. For example, it’s usually 5% tints that we’ll see on limousines for privateness.
So, becoming a 5% tint to a window will permit 5% gentle to journey by the glass from exterior to inside, proper? NO! As a result of we have to take into accounts the precise VLT of the window earlier than the tint is even put in. There isn’t any such factor as a chunk of glass, regardless of how clear it seems, with a VLT of 100%. It is because glass naturally filters out a bit of little bit of seen gentle.
Lets take a look at automotive window tinting as that is one space the place we converse of VLT usually on account of the truth that many international locations have legal guidelines in place limiting how darkish automotive home windows must be tinted. Most fashionable vehicles come from manufacturing unit with home windows studying a VLT someplace between 72% and 78%, relying on producer, mannequin and nation. Say, our instance automotive’s home windows learn at 72% and we add a 50% window tinting movie, what’s the new and ultimate VLT of our automotive’s home windows after set up?
The sum could be very easy: V1 x V2 = V3 (The place V1 is the unique VLT of the glass earlier than tinting, V2 is the VLT of the window tinting movie and V3 is the ultimate VLT worth of the glass with tint movie utilized).
Our automotive’s home windows authentic VLT = 72% and the tint = 50 %, thus V1 = 72 and V2 = 50
The sum is 72 x zero.50 giving us 36, which we are going to specific as a share. So a window with an authentic VLT of 72% will then have a VLT of 36% after software of a 50% movie.