All glass bottles and jars are recyclable and there are more than 3 000 bottle banks strategically placed in cities throughout South Africa to assist in domestic recoveries. This waste glass, banked for the good of the environment, is collected by local independent registered waste collection agents and sold back to the glass packaging industry.
Once collected, waste glass is separated into colours, cleaned and crushed into what is known as cullet. Before recycled glass is melted, contaminants must be removed in the processing plant and include:
|•||Ceramic and wire caps|
|•||Lead collars and foils|
|•||Stones, dirt and labels|
|•||Metal caps, lids and neck rings and aluminium|
The cullet is then mixed with silica sand, soda ash and limestone, and while these are all plentiful natural ingredients, they are finite. By supplementing these raw materials with between 355 and 80 % cullet depending on furnace colour, our irreplaceable natural resources are conserved. This mixture is melted (at lower temperatures because of the inclusion of cullet) into a molten state, poured into moulds and slowly cooled.
did you know
Every 10% increase in recycled glass equals a decrease of:
|•||10% in sulphur dioxide (SO2)|
|•||6% in nitrogen oxide (NO2)|
|•||17% in carbon dioxide (CO2)|
|•||1% in electricity and natural gas|
|•||6% in furnace temperatures (during the manufacturing process)|
|•||8.5% in raw materials|