Splotches on glass
Thread Starter
Drifting
Joined: Jul 2004
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From: Celina ohio
Splotches on glass
I don't often wear sun glasses. I just got home from a ride (while wearing sun glasses) and I see splotches on both side windows and rear window. When I take my glasses off, I can still see them, but not near as much.
Have any of you ever seen anything like this?
Have any of you ever seen anything like this?
Thread Starter
Drifting
Joined: Jul 2004
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From: Celina ohio
I'll try the clay bar. But it looks like it is in the glass? It kinda has a mirror glaze like the cheap window tint you see on some cars. It's hard to explain. Looks like a leopard.
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It's ONLY visible when you wear polarized glasses. Try it without polarized sunglasses and no "splotches" 
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I was told once that the spots show where the glass is under stress. It doesn't take much stress to refract the light a few wavelengths different, thus the "spots" They are IN, not ON the glass. Can't do a thing about them...
Pro
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The spots are normal. Tempered glass has the spots. They can even be seen without polarized sun glasses when the light is just right. You will see the spots on any car with tempered glass.
Tempered Glass <~~~(scroll down and read the last paragraph)
Tempered Glass <~~~(scroll down and read the last paragraph)
Last edited by Donovan 572; Oct 6, 2004 at 03:29 AM.
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From: Oklahoma City OK
C6 of Year Finalist (appearance mods) 2019
Originally Posted by Donovan 572
The spots are normal. Tempered glass has the spots. It can be seen without polarized sun glasses when the light is just right. You will see the spots on any car with tempered glass.
Tempered Glass <~~~(scroll down and read the last paragraph)
Tempered Glass <~~~(scroll down and read the last paragraph)
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by Donovan 572
The spots are normal. Tempered glass has the spots. It can be seen without polarized sun glasses when the light is just right. You will see the spots on any car with tempered glass.
Tempered Glass <~~~(scroll down and read the last paragraph)
Tempered Glass <~~~(scroll down and read the last paragraph)
It's the way the glass was manufactured ..You guys are funny ... "CLAY BAR" ... It's like the father in "My Big Fat Greek Wedding" ... he put Windex on everything! 
Race Director
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From: Paducah KY
Cruise-In VII Veteran
Originally Posted by blacksedan87
It's ONLY visible when you wear polarized glasses. Try it without polarized sunglasses and no "splotches"
It's the polarized lens on your sun glasses causing this effect. 
Advanced
Joined: Jul 2003
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From: Indianapolis Indiana
I was a QA guy at a large Auto glass manufacturer for 5 years and we made most of GM's tempered glass. When a piece of flat glass rolls through the oven it immediately enters a press form station. After it leaves this station it rolls through a series of high volume blast tubes that shoot air onto the glass in a quenching operation. Direct pinpoint blasts of air cause most of the spots that you see. We would use a crossfire quenching approach with the air tubes to cut down on the spotting, but more complex bends such as our back windows were much tougher and the scrap rates were tremendous.
Burning Brakes
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From: Murrieta CA
Originally Posted by blacksedan87
It's ONLY visible when you wear polarized glasses. Try it without polarized sunglasses and no "splotches"
