GLASS

Silica is the main constituent of glass. But in this chapter, it is to be added with sodium potassium carbonate to bring down melting point. Lime or lead oxide is also added to make it durable. In the impure silica Manganese oxide is added to nullify the adverse effects of unwanted iron present. The raw materials are sieved and ground. They are mixed in particular proportion and melted in furnace. Then by blowing, flat drawing, rolling and pressing glass items are manufactured

Properties of Glass are describe

1. Glass absorbs, refracts or transmits light. It can be made transparent or translucent.

2. Glass can take excellent polish.

3. Glass is an excellent electrical insulator.

4. Glass is strong and brittle.

5. Glass can be drawn, blown or pressed.

6. Glass is not affected by atmosphere.

7. Glass has outstanding resistance to chemicals.

8. Glass is available in several beautiful colours.

9., it is possible to make glass lighter than cork or stronger than steel with the advancement in technology.

10. Glass panes can be cleaned simply.