Float glass has the following composition:

• Silicate Sand, the base component in the form of sand (70 - 72%).
• Sodium Carbonate, sulphates and nitrates (approximately 14%).
• Calcium Carbonate, used as a melting agent to homogenize the mixture (about 10%).
• Various others oxides such as alumina and manganese to improve the physical properties of glass, including its resisance to atmospheric pollutants.
• For body-tinted glass, metal oxides can also be incorporated.