Canning and Fish Packaging Technology

Unit 14 - Glass containers and Closures

14.1.3.Raw materials for the manufacture of glass

• High Purity sand (SiO₂)
• Lime stone (CaO)
• Soda ash (Na₂CO₃)

In addition to the above broken glass (Cullet) is also added to hasten melting and make the batch more workable. In addition, some other materials are also added such as colouring compounds.