EPA7X1

Anyone know? I have tried searching but found no definite answer. The inspection stations around here won't pass you if you are <32% VLT Net.

GIBSON6594

whats the question?

EPA7X1

What is the light transmittance of the factory glass? This is the % light that comes through, like 35% tint lets 35% of the light in. NC looks at net light transmittance when checking your tint for yearly inspections. The limit is 32% net. So if you, for example, have factory glass that is 70%, but only 35% tint, your light transmittance would be .245 and you would fail inspections.

I guess I could let the inspection station check it before I apply tint, and adjust the tint I use accordingly. I was hoping to avoid that if I could.

RogerPodacter

i'm sure the TSX from the factory will pass that test, unless you added tint aftermarket. they cant fail a brand new stock car that came from the factory i dont think...

Master47

I think he wants to know how much the stock glass is, so that when/if he were to get tints, the the stock glass tint (very minor) + his aftermarket tint % does not exceed regulation.

moda_way

I would think a tint shop could tell you.

vidgamer

I'd like to know too, but more for my curiousity. It seems to be tinted a lot more than most cars I recall....

TSX.Fury

My tint shop told me 98%, hence after they put on 40% film and measured the light it turned out to be 38%.

waterrockets

Typically, glass loses 4% of light transmitted through an air-exposed surface. This is just from the reflectivity of the glass, with no tinting at all. That would leave you with 96%. The final number of 38% for your car is a function of more than just tints, but the reflectivity of the glass itself. You can't just add the tints and come up with a number for light transmission.

Anyway, I'm sure a tint shop would measure your current tint % before choosing a tint if you asked.

Otherwise, find a photographer friend who owns a luxmeter and use that. Pull into a dark garage, measure the light from a work light at 6" from the frontmost part of the work light. Then put the light against the glass to be measured and repeat the test from the inside of the window at 6" minus the glass thickness. Divide the 2nd measurement by the 1st, and you have your transmission percentage.

CJams

Not all tint shops have a Photometer type device to measure the the light transmission. I would venture to say that the stock glass transmits 94-98% light. Another factor that would put your window tint out of spec is how much dirt you have on your window. If you go get your windows tested with dirty dirty windows, it could put you out of spec.