What is "privacy glass"??
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Re: What is "privacy glass"?? (Junglist)
They could be tinted windows on vehicles, but they are widely used outside of the automobile industry as well.
Go here to see an example... http://www.wearingwilliams.mb.ca/privacy.html
[Modified by KANJI, 2:59 PM 7/10/2002]
Go here to see an example... http://www.wearingwilliams.mb.ca/privacy.html
[Modified by KANJI, 2:59 PM 7/10/2002]
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From: Kelowna Canada
Re: What is "privacy glass"?? (Junglist)
Privacy glass is different from aftermarket tint in that the tinted film is sandwiched between two layers of glass (all safety glass has a film sandwiched inside btw but in privacy glass it's just darker).
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (Phat Bastard)
Privacy glass is different from aftermarket tint in that the tinted film is sandwiched between two layers of glass (all safety glass has a film sandwiched inside btw but in privacy glass it's just darker).
Only windshields has laminate in between layers of glass.
Door glass and back glass is made with the tint in the glass itself. ALL glass is tinted but most is so little you can't tell. Glass on our cars is green tinted and dark tint comes on SUV and trucks due to a law that does not allow tinted windows from the factory on "passenger cars" but does not apply to trucks and SUV's. Technically it isn't even illegal to paint the back and rear door glass of a truck or SUV so that it is Opaque.
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From: Toms River, NJ, USA
Re: What is "privacy glass"?? (Asahi)
Privacy glass is different from aftermarket tint in that the tinted film is sandwiched between two layers of glass (all safety glass has a film sandwiched inside btw but in privacy glass it's just darker).
Not true . . .
Not true . . .
Technically it isn't even illegal to paint the back and rear door glass of a truck or SUV so that it is Opaque.
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From: SoCal
Re: What is "privacy glass"?? (Jason)
Actually I think the law in SoCal is if you have two functioning rear view mirrors (right and left door) than the rear windows can be opaque. No tint is allowed on front windshield or drivers side and passenger side door glass.
Basically everything behind the driver is game as long as both side mirrors are functional.
[Modified by CKDC2, 11:51 PM 7/10/2002]
Basically everything behind the driver is game as long as both side mirrors are functional.
[Modified by CKDC2, 11:51 PM 7/10/2002]
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From: Kelowna Canada
Re: What is "privacy glass"?? (Jason)
This would be known as tempered glass and is the windshield of vehicles, not anywhere else...that's why a windshield won't shatter like your side/rear windows
Not true at all.....
"Tempered Glass
DEFINITIONS
In the production of flat glass the molten silica-based mix is cooled slowly under carefully controlled conditions. This annealing procedure removes undesirable stresses from the glass. Cooling occurs in an annealing "lehr"; hence, the glass is termed "annealed" or "ordinary" glass. Annealed glass which has been heated to a temperature near its softening point and forced to cool rapidly under carefully controlled conditions is described as "heat-treated glass." The heat treating process produces highly desirable conditions of induced stress (described below) which result in additional strength, resistance to thermal stress, and impact resistance.
Heat-treated glasses are classified as either fully tempered or heat strengthened. According to Federal Specification DD-G-1403B, fully tempered glass must have a surface compression of 10,000 psi or more or an edge compression of 9,700 psi or more. Heat-strength glass must have a surface compression between 3,500 and 10,000 psi, or an edge compression between 5,500 and 9,700 psi. The fracture characteristics of heat- strengthened glass vary widely from very much like annealed glass near the 3,500 psi level to similar to fully tempered glass at the 10,000 psi level."
tempering is a heat treating process - not a term for laminate glass:
From the PPG website: (largest supplier of OEM glass)
Auto glass is not "just glass"
Know the difference.
On a new car, every part comes from the original equipment manufacturer (the OEM), including the windshield. For windshield replacement, you have the option to select a replacement made by a company that manufactures OEM windshields, such as PPG, or glass made from non-OEM manufacturers ("aftermarket glass"). Both OEM and aftermarket glass must comply with the Federal Motor Vehicle Safety Standards, but — there are two important OEM benefits:
An OEM replacement windshield is produced from original equipment-style tooling. This type of windshield will have the appearance of your car's original windshield and will fit properly in the window frame making noise and leakage problems much less likely.
OEM glass manufacturers partner with automobile producers to enhance overall functionality and improved performance. Because of their close work with carmakers, OEM manufacturers have a greater knowledge of the engineering demands a car can place on the windshield and their replacement windshields are made using the same quality assurance systems as for new vehicles.
Safety glass is used in all automobile glass. It is manufactured to reduce the likelihood of injury, if it breaks. There are two different types: laminated glass and tempered glass.
Windshields are made from a lamination process. A windshield actually consists of two pieces of glass, bonded together by a vinyl inter-layer. This vinyl layer cushions your head during impact. If a windshield breaks during impact, the broken pieces will generally adhere to the plastic lining.
Side and rear windows consist of tempered glass, which is produced by heating the glass to more than 1,100°F and then rapidly cooling it. This results in the outside surfaces of the glass becoming harder than the center of glass and, therefore, is stronger than regular glass of the same thickness. If broken, tempered glass will break-up into very small pieces.
I'm pretty sure Mercedes uses laminate glass on the side windows of their cars.
Vehicles with side airbags will also need laminate glass on the sides too, no?
[Modified by Phat Bastard, 4:15 PM 7/10/2002]
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (Jason)
ever noticed a fullsize fan with windpow slots that didn't have windows installed instead it is sheet meatl. THere are no rear window requirements on truck, vands or SUV's. I go this from working as a quality engineer for Carlex Glass Company for 3 years. THey supply glass to Nissan, Subaru, GM, Mazda and some others.
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (Phat Bastard)
This would be known as tempered glass and is the windshield of vehicles, not anywhere else...that's why a windshield won't shatter like your side/rear windows
Not true at all.....
"Tempered Glass
DEFINITIONS
In the production of flat glass the molten silica-based mix is cooled slowly under carefully controlled conditions. This annealing procedure removes undesirable stresses from the glass. Cooling occurs in an annealing "lehr"; hence, the glass is termed "annealed" or "ordinary" glass. Annealed glass which has been heated to a temperature near its softening point and forced to cool rapidly under carefully controlled conditions is described as "heat-treated glass." The heat treating process produces highly desirable conditions of induced stress (described below) which result in additional strength, resistance to thermal stress, and impact resistance.
Heat-treated glasses are classified as either fully tempered or heat strengthened. According to Federal Specification DD-G-1403B, fully tempered glass must have a surface compression of 10,000 psi or more or an edge compression of 9,700 psi or more. Heat-strength glass must have a surface compression between 3,500 and 10,000 psi, or an edge compression between 5,500 and 9,700 psi. The fracture characteristics of heat- strengthened glass vary widely from very much like annealed glass near the 3,500 psi level to similar to fully tempered glass at the 10,000 psi level."
tempering is a heat treating process - not a term for laminate glass:
From the PPG website: (largest supplier of OEM glass)
Auto glass is not "just glass"
Know the difference.
On a new car, every part comes from the original equipment manufacturer (the OEM), including the windshield. For windshield replacement, you have the option to select a replacement made by a company that manufactures OEM windshields, such as PPG, or glass made from non-OEM manufacturers ("aftermarket glass"). Both OEM and aftermarket glass must comply with the Federal Motor Vehicle Safety Standards, but — there are two important OEM benefits:
An OEM replacement windshield is produced from original equipment-style tooling. This type of windshield will have the appearance of your car's original windshield and will fit properly in the window frame making noise and leakage problems much less likely.
OEM glass manufacturers partner with automobile producers to enhance overall functionality and improved performance. Because of their close work with carmakers, OEM manufacturers have a greater knowledge of the engineering demands a car can place on the windshield and their replacement windshields are made using the same quality assurance systems as for new vehicles.
Safety glass is used in all automobile glass. It is manufactured to reduce the likelihood of injury, if it breaks. There are two different types: laminated glass and tempered glass.
Windshields are made from a lamination process. A windshield actually consists of two pieces of glass, bonded together by a vinyl inter-layer. This vinyl layer cushions your head during impact. If a windshield breaks during impact, the broken pieces will generally adhere to the plastic lining.
Side and rear windows consist of tempered glass, which is produced by heating the glass to more than 1,100°F and then rapidly cooling it. This results in the outside surfaces of the glass becoming harder than the center of glass and, therefore, is stronger than regular glass of the same thickness. If broken, tempered glass will break-up into very small pieces.
[Modified by Phat Bastard, 4:11 PM 7/10/2002]
[Modified by Phat Bastard, 4:12 PM 7/10/2002]
Not true at all.....
"Tempered Glass
DEFINITIONS
In the production of flat glass the molten silica-based mix is cooled slowly under carefully controlled conditions. This annealing procedure removes undesirable stresses from the glass. Cooling occurs in an annealing "lehr"; hence, the glass is termed "annealed" or "ordinary" glass. Annealed glass which has been heated to a temperature near its softening point and forced to cool rapidly under carefully controlled conditions is described as "heat-treated glass." The heat treating process produces highly desirable conditions of induced stress (described below) which result in additional strength, resistance to thermal stress, and impact resistance.
Heat-treated glasses are classified as either fully tempered or heat strengthened. According to Federal Specification DD-G-1403B, fully tempered glass must have a surface compression of 10,000 psi or more or an edge compression of 9,700 psi or more. Heat-strength glass must have a surface compression between 3,500 and 10,000 psi, or an edge compression between 5,500 and 9,700 psi. The fracture characteristics of heat- strengthened glass vary widely from very much like annealed glass near the 3,500 psi level to similar to fully tempered glass at the 10,000 psi level."
tempering is a heat treating process - not a term for laminate glass:
From the PPG website: (largest supplier of OEM glass)
Auto glass is not "just glass"
Know the difference.
On a new car, every part comes from the original equipment manufacturer (the OEM), including the windshield. For windshield replacement, you have the option to select a replacement made by a company that manufactures OEM windshields, such as PPG, or glass made from non-OEM manufacturers ("aftermarket glass"). Both OEM and aftermarket glass must comply with the Federal Motor Vehicle Safety Standards, but — there are two important OEM benefits:
An OEM replacement windshield is produced from original equipment-style tooling. This type of windshield will have the appearance of your car's original windshield and will fit properly in the window frame making noise and leakage problems much less likely.
OEM glass manufacturers partner with automobile producers to enhance overall functionality and improved performance. Because of their close work with carmakers, OEM manufacturers have a greater knowledge of the engineering demands a car can place on the windshield and their replacement windshields are made using the same quality assurance systems as for new vehicles.
Safety glass is used in all automobile glass. It is manufactured to reduce the likelihood of injury, if it breaks. There are two different types: laminated glass and tempered glass.
Windshields are made from a lamination process. A windshield actually consists of two pieces of glass, bonded together by a vinyl inter-layer. This vinyl layer cushions your head during impact. If a windshield breaks during impact, the broken pieces will generally adhere to the plastic lining.
Side and rear windows consist of tempered glass, which is produced by heating the glass to more than 1,100°F and then rapidly cooling it. This results in the outside surfaces of the glass becoming harder than the center of glass and, therefore, is stronger than regular glass of the same thickness. If broken, tempered glass will break-up into very small pieces.
[Modified by Phat Bastard, 4:11 PM 7/10/2002]
[Modified by Phat Bastard, 4:12 PM 7/10/2002]
Basically side (door) and rear glass is always tempered glass. THis means when you break it, it will crumble into small pieces. Hardly any of the specs you mentioned above are used in the automotice industry to test temepered glass. you will more likely find tests such as weight or size of the largest piece and wether it meets industry requirements.
Windshield glass has a laminate in it that is nothing more than a thng piece of plastic. It is placed between 2 piece of glass and those pieces of glass and plastic are placed in a mold. THey then go through a heating process that causes the sag that causes the windshields shape. WHen broken windshields will not break into pieces but instead stretch due to the laminate. Windshields under go tests that include ball drop and dart drop tests and measure the amount of penetration from different heights.
if you really want to start talking about auto glass does someone want to gues what average light transmission of a windshield is?
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (Phat Bastard)
I'm pretty sure Mercedes uses laminate glass on the side windows of their cars.
Vehicles with side airbags will also need laminate glass on the sides too, no?
[Modified by Phat Bastard, 4:15 PM 7/10/2002]
THere is no reason for side air bags to require laminate glass. on a hard enough side impact the side glass will break out.
To supplememt the statement about cushioning the drivers head concernming a windshields construction it makes windshield glass stronger in the fact that it will prevent a driver from going through the windsield while allowing the windshield to "give" when inpacted.
please excuse my spelling I am still waiting for zeroforum to have spell check feature
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (MiGs)
to be honest I know a good bit about Integras but would hardly call myself an info master.
Automotive glass however I know way more than I care to and more than most care to hear. I worked with this stuff from day to day as a Quality Engineer. I can tell you how it is tested and all the different types of glass defects you should/could watch for on a car.
Automotive glass however I know way more than I care to and more than most care to hear. I worked with this stuff from day to day as a Quality Engineer. I can tell you how it is tested and all the different types of glass defects you should/could watch for on a car.
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From: Kelowna Canada
Re: What is "privacy glass"?? (Asahi)
Asahi - i'm not arguing with you 
Rapist said front glass is classified as tempered and I said it was safety glass.
If tempered side glass mirrored or partially mirrored (i.e. Lexus RX300) how is it they get the mirror so uniform if the tint color is embedded within the glass then?? Why wouldn't they use a film instead - it would be much cheaper.
Rapist said front glass is classified as tempered and I said it was safety glass.
If tempered side glass mirrored or partially mirrored (i.e. Lexus RX300) how is it they get the mirror so uniform if the tint color is embedded within the glass then?? Why wouldn't they use a film instead - it would be much cheaper.
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From: Chattanooga, TN, USA
Re: What is "privacy glass"?? (Phat Bastard)
I didn't understan jasons statement so I glazed over it .. .
Glass when made even colored (privacy) glass is not tempered or laminated. these features are done my the auto glass manufacturer. THat measn SHeets of tinted glass come in as regular glass just like you would see in a house window but thicker.
The bending process is when glass is tempered and made into auto safety glass. There are 2 main oven process es this can happen one is called the gas hearth where a piece of glass slides through an oven on a cuchion of air like a air hocky table. the other is called the QSB which places the piece in a mold and then heats it up and then blows cold air on it (COld air is also part of the gas hearth process).
Has anyone ever noticed back and small side glass pieces sometimes have dark dots about the size of a dime? that is where the glass cooled at different rates during the tempering process.
PB that all being said they make the glas by pulling it through a tin float the glass is actually uniformly colored all the way through no matter how much tint or reflection there is. a FIlm woyuld have to be allplied after the glass was actually tempererd as where the tint that is used now is made when the glass if first produced and prevents an extra time consuming step that would also require more material. Tinted glass is so popular these days it has actuall become less exspensive than green glass (normal glass). SO to answer you question again they do it cause it costs less.
Glass when made even colored (privacy) glass is not tempered or laminated. these features are done my the auto glass manufacturer. THat measn SHeets of tinted glass come in as regular glass just like you would see in a house window but thicker.
The bending process is when glass is tempered and made into auto safety glass. There are 2 main oven process es this can happen one is called the gas hearth where a piece of glass slides through an oven on a cuchion of air like a air hocky table. the other is called the QSB which places the piece in a mold and then heats it up and then blows cold air on it (COld air is also part of the gas hearth process).
Has anyone ever noticed back and small side glass pieces sometimes have dark dots about the size of a dime? that is where the glass cooled at different rates during the tempering process.
PB that all being said they make the glas by pulling it through a tin float the glass is actually uniformly colored all the way through no matter how much tint or reflection there is. a FIlm woyuld have to be allplied after the glass was actually tempererd as where the tint that is used now is made when the glass if first produced and prevents an extra time consuming step that would also require more material. Tinted glass is so popular these days it has actuall become less exspensive than green glass (normal glass). SO to answer you question again they do it cause it costs less.
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