Probably the wrong forum to post this, but a buddy of mine was telling me that the weight difference between a factory piece of door glass and a new aftermarket piece of door glass was pretty significant. Oer says their door glass for a 71 duster is 15lbs and the quarter glass is 5lbs. Anybody offhand know what a factory door glass weighs?
Window glass.
- Thread starter Scampin
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i heard that also. Wonder where the weight saving comes from. It doesn't seam thinner
Treblig
Well-Known Member
Aftermarket glass is made of transparent aluminum (like in Star Trek). Aluminum is ligher than regular glass!!!
I am told, that modern glass is measured in mm and is indeed thinner than OEM.
This supposedly shows up when you install the thinner glass in an OEM sized windshield gasket.
This supposedly shows up when you install the thinner glass in an OEM sized windshield gasket.
Scamp Rhonda
Well-Known Member
My guess and it's only a guess, is the plastic in-between the glass layers is thicker on the new stuff for safety and weight savings. I used to cut glass for locomotives and other railroad equipment back in the '80s. It wasn't an exact science, it was all done by hand. We used to cut the glass on both sides as closely aligned as possible. Then bend it enough to snap it and then cut the plastic with a razor blade knife. If you bent it too much it would chip the edges of the glass. Then we figured out a new way to do it by putting lighter fluid on the crack and lighting it up to melt the plastic. A lot less chipped edges that way. Anyway, I wished the plastic in the glass was thicker back then. It would have been easier to work with. Lol
Treblig
Well-Known Member
But doesn't all auto glass have to meet strict government standards for safety????
Scamp Rhonda
Well-Known Member
Definitely, but I think part of that is the glass has to break easily without any glass shards in the event of an accident; in example, someone going through a windshield. It is also a part of integral strength of a vehicle. Don't quote me on any of that. Those are just my old memories that I think are correct. Lol. And locomotive glass is 9/16" thick thick, so that's a different animal.
Treblig
Well-Known Member
The way I see it, with all due respect, the thickness of the plastic is a big factor on how well the glass holds up during impact? The thinner the plastic the easier the glass gets destroyed? I may be wrong???Definitely, but I think part of that is the glass has to break easily without any glass shards in the event of an accident; in example, someone going through a windshield. It is also a part of integral strength of a vehicle. Don't quote me on any of that. Those are just my old memories that I think are correct. Lol. And locomotive glass is 9/16" thick thick, so that's a different animal.
Scamp Rhonda
Well-Known Member
Yes, I see your point. The glass should be made to break up into pieces easier and still stick to the plastic. And, with thicker plastic that might make it more difficult. Ahhh! I think we need a more expert opinion
There isn't any plastic in the side glass only in windshields, front & rear.
I was told by Joe Suchy the big early B body vendor, that repop windshield glass offered thru AMD was actually the correct OEM thickness and new glass is thinner. I admit I have no knowledge about such as to side glass.
Wold not all auto glass be safety glass.? Just wondering.
Wold not all auto glass be safety glass.? Just wondering.
For DOT standards, US made cars have tempered side and rear glass.
They break into little cubes to prevent severe lacerations.
Windshield is different, its laminated, so it prevents total breakaway and designed to stay in one piece.
They break into little cubes to prevent severe lacerations.
Windshield is different, its laminated, so it prevents total breakaway and designed to stay in one piece.
Only when they make the car. If the window gets broke see if your insurance will pay for a factory glass. No they won't, Only glass that meets the replacement requirements. I wanted to have my windshield on my new truck replaced at the Dealer so it had the mopar star. They wouldn't do it they called in a glass shop to the body shop. The insurance had them right on the estimate. They wouldn't even install a used windshield because the prep would cost more.
Well if they say theirs is 15lbs, I assume there is some error there, but not enough for me to think about if factory is almost exactly the same. Thank you!!
Lonnie Leach
Duster/ Valiant
Have a friend that told me that too But only on Windshield. they use a thicker plastic in the middle to make up the thickness did not hear it about side glass ?
Side glass is tempered. Shatters in a zillion small pieces. Wind shields have the laminated glass& plastic in between the two glass panels. Breaks but supposedly not fall apart in you face/ lap.
Lonnie Leach
Duster/ Valiant
That's what i said they don't use plastic film in tempered because they heat to higher Temp for temper
I agree that we agree ! Sorry but I didn't read all the previous post !
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