One of these methods is the "float method," which is the standard method for making plate glass used for windows and TV ^screens*2). In this process, the "base" of the glass, which is still red hot, is placed in a large tank in which a metal called tin is melted. The glass is spread flat, cooled, and hardened, and then drawn out and stretched with a roller conveyor to produce flat glass of uniform thickness and width.

Another method is the "roll-out method," which produces screened glass and molded glass. In this method, the melted glass "base" is inserted between two rolls from the top and bottom and stretched to form sheet glass. Before the rolls are inserted, a wire mesh is combined with the glass, and the mesh glass comes out of the rolls as mesh glass.

To make bottles, the glass "base" is first made into small chunks and poured into molds (metal molds that do not melt even at high temperatures) to form the original shape of the ^bottle*3). Then, a rod-shaped mold is used to shape the bottle into a wide-mouthed bottle, or high-pressure air is used to inflate the bottle to form a narrow-mouthed bottle.

In this way, glass of various sizes and shapes can be made by combining a number of materials and using a construction method that suits the purpose.

By the way, why is glass transparent?

Keisha, the main material used to make glass, is a highly transparent mineral that does not absorb light. However, that is not the only reason why glass is transparent.

When a glass material is melted, the boundary between particles disappears. When the melted material is cooled, it solidifies while the molecules are neither liquid nor solid (this state is called the "glassy state "^*4). 4) This allows light entering the material to pass through without being scattered, making the glass appear transparent.