Adam Ligon wrote:
Chris Landi wrote:
I've never kept a car long enough to notice dash or seat fade. Plus, I use a sun shade to keep the materials from absorbing heat.
I'm sure some UV gets through but UV blocking is inherent with glass. The thicker the better from what I've read.
Read more....
Regular glass does nothing for UV, no matter the thickness. That is why you pay more for nicer windows in your house that have coatings or a film to block the UV light.
Also why sunglasses, though most are plastic now, can come polarized or with coatings to block the UV light.
The Low-E windows for houses are tinted and contain gas and a thin copper film to block more UV than a standard window, and to repel heat loss.
The windshield in your car blocks more UV than the side windows so maybe fading is coming in from the side. I believe the windshield is treated with a thin layer of UV blocking material adding to the, I think, UVB blocking??, inherent in glass.
Here's a quick read. Too busy to keep searching.
http://www.lupusmn.org/Education/Articl ... dLupus.htm
"It is the burning ultraviolet B rays (UVB) in sunlight that are particularly bad for LE patients. However, some longer wavelength ultraviolet A rays (UVA) can also aggravate cutaneous LE, especially SCLE. A standard pane of window glass blocks UVB rays but allows UVA rays to pass through. The safety glass in a vehicle windshield is designed to filter out most UV light. In addition, most UV-absorbing window tinting films are very effective at blocking both UVB and UVA rays."
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