On May 2, 10:06 am, Peter Huebner wrote:
In article , removespamlcb11211
@swbell.net says...



Apparently windshields have some type of filter and or indirect light does
not affect the finish. Some automatic tenting prescription glasses will not
darken behind a windshield.

Glass does cut a great deal of UV out of direct sunlight. Alas, not all of it.
The jarrah inlay in my kitchen table has faded from purple to pale brown :-(

Auto safety glass is a glass-plastic-glass sandwich. The glass
doesn't
block the UV, the plastic core does. Printers who use UV exposure
lamps
use glass plate holders, never plastic.