For decorative use ,so you can't see a clear image through them
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Usually to allow them to let light in while still blocking people's views.
You might not want people to be able to see into the bathroom for instance.
Frosted glass is used on windows that will let in sunlight, but will stop people looking in from outside. A bathroom, or glass panels on an external door, will usually have frosted glass for privacy. Apart from frosted, other patterns can be used - small dimples, raised spots or lines, etc, can also be used.
Usually glass it's the part you look through!
because it's the cheapest thing around that does what glass is supposed to do! It's basic ingredient is sand (silica)
Hi: There is a manufacturer which I believe uses the name Thermo Pane for its window products, however, there are several manufacturers of similar systems and most all emplyee the same concepts to achieve their goals so far as I'm aware of. Two or three layers of glass with dry air space in vacuum or some low pressure gas between them to create a insulation effect. Some use special type glass with plastics mixed within the glass to further their ability to insulate and the list goes on I'm sure. A old trick is to use a cigarette lighter or candle and count the flames you see in the glass as you hold it up to it. Count the flames and minus one tells you how many layers of glass their is in that particular window. So, three flames would mean two panes of glass. Don't get thermoglass confussed with thermo pane though. Thermo Glass is just glass with plastic pigments made within it to act as an insulator. Pretty good stuff! but not nearly as good as multiple pane glass with a vacuum or dry gas between panes. There are other types of energy saving glass as well. Its really interesting if you have the time to dwell on it. Hope this helps: Jimiwane
Silica sand and other minerals are melted. Sometimes color is added. The molten glass is poured into a mold and cools quickly. Immediately after the mold it is put in a 900 degrees Fahrenheit kiln. When the people are done making the glass they turn off the kiln and allow the glass to cool slowly. Panes of glass are made when molten glass is pressed between two rollers, forming a long thin sheet of glass.