Various types of glasses used in doors are these-
- Clear window glass
- Plate glass
- Prism glass
- Quartz glass
- Processed glass
- Frosted glass
- Wire glass
- Bullet proof glass
- Pinhead glass
- Insulating glass
- Colored glass
Clear window glass:
It is thin transparent flat glass. Its thickness varies from 2.5 to 7.5 mm.
It has prism shaped ribs which reflect light. These prisms are provided at different angles.
It is also plain flat transparent glass in thickness of 3 to 32 mm; fitted in the windows of costly buildings.
This glass transmits ultra- violet rays and is used in hospitals.
- The various types available are ground glass, chipped one process and chipped two process glasses.
- Some are used for providing privacy because they scatter/diffuse light while others transmit maximum light.
- This glass is made by breaking up of the polished surface by a sand blast (High-pressure air mixed with sand applied to the surface of glass to carve texture or to get a cloudy dull finish).
- It is used to reduce heat and glare.
- It is referred as ground glass or translucent glass also and is used mainly in toilets and other places where vision is blocked.
A network of wire is embedded in the glass for strengthening.
Bullet proof glass:
This glass is manufactured with laminated plate. The glass breaks under the impact but does not turn into pieces.
This is also called perforated glass. Holes are made in sheet or plate glass with the help of roller to produce diffusion. It is used for the same purposes as frosted glass for.
It is fitted in windows to prevent heat loss. The glass consists of two or more tightly sealed sheets separated by 6-12 mm of dry air.
It is made by adding oxides of metals to molten glass.