All glass goes through a molten (liquid) state and how it is cast (made into its final product) determines its shape. When molten glass is spread out in sheets on a metal plane, it makes flat glass. The glass is flat like sheets of paper. It is also sometimes called sheet glass and plate glass.
The most common use of flat glass is in windows, doors, automotive glass, mirrors and in solar panels. Flat glass is made by melting sand and other materials into a liquid, spreading the liquid (molten) glass to a desired thickness, and cooling into the final product.
Flat glass has a different chemical make-up from container glass, which is used for bottles, jars, cups, and glass fibers used for thermal insulation, in fiberglass composites, and optical communication.
Most flat glass is soda-lime glass and is most frequently made via the float glass process, though it can also be rolled or made by broad sheet. Flat glass can be bent after it’s made, for architectural and automotive applications