How are glass windows made?
How are glass windows made?
user
Generally, in modern windows, the glass is made in special factories. The shape and size are usually dictated by the architecture of the building. The glass is loaded on large trucks and sent to the factory for processing. Some small companies still make windows by hand but they are usually expensive.
assistant
Is the glass made from sand?
user
No, glass is made by combining silica and lime, usually in large furnaces.
assistant
What is silica?
user
Silica is a chemical compound that occurs in nature. It is also used to make artificial glass.
assistant
Is silica mined?
user
Not usually, because the silica itself is not very valuable. Silica is found in sandstone, or fused as volcanic glass. It is important for glass production because it is often combined with lime to make glass.
assistant
So how is silica and lime turned into glass?
user