Interesting, yet pointless, finding.
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,624
Likes: 308
From: Mont Belvieu Tx
Interesting, yet pointless, finding.
I just noticed that the front windshield of the C5 blocks U/V light pretty darn well. I have the vette in my garage halloween display flooded with black lights. And when I went to put highly fluorescent skull on the front dash pad, it no longer would glow at all... zip... nada. Interesting. I had no idea the windshield would block out that much of the black lights.
I guess they had a point in making the glass be that way. not sure what it is though.
I guess they had a point in making the glass be that way. not sure what it is though.
Burning Brakes
Joined: Aug 2005
Posts: 1,142
Likes: 3
From: Los Angeles CA
Nope........here's a little glass info !!!!!!!!!
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
Last edited by poolhustler; Oct 23, 2005 at 10:48 PM.
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Melting Slicks
Joined: Feb 2004
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From: Insane Diego Kalifonya Baby
Originally Posted by poolhustler
Nope........here's a little glass info !!!!!!!!!
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
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Learned something new about auto glass - thanks. 
Tech Contributor
Joined: Dec 2003
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From: Horncastle Lincolnshire, England
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Originally Posted by poolhustler
Nope........here's a little glass info !!!!!!!!!
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
All automotive safety glass does NOT block UV. Front windshields are made from laminated glass which is two layers of float glass (not tempered) and has a PVB (Poly Vinyl Butyl) interlayer, which is typically .030" thick. All other automotive glass is tempered glass which is a heat treated glass. It is 8-10 times stronger impact wise than regular float glass (annealed glass). Laminated glass blocks approx. 99.6% of all UV light. So, apparently, a black light emits light from the UV spectrum. Tempered glass or annealed glass blocks a very small percentage of UV and tinted glass will block a bit more. You can get sun burned through all glass except the front windshield. The HUD is a special film that is inserted between the glass only in the area of the display, not the whole windshield area. Its been a while since I was in the glass biz, but this is what I remember.!!!!
Russ....
Any idea what the HUD film is and what it does?
Burning Brakes
Joined: Oct 2003
Posts: 1,106
Likes: 1
From: Foresters Falls(near Ottawa) Ont
Originally Posted by vettman96
Do you think it may have something to do with the HUD? I
think I read somewhere that the center of the sandwich is
altered for the display.
think I read somewhere that the center of the sandwich is
altered for the display.
The HUD windshield was almost twice the price!!!!!!
RonJ ...
