Frequently Asked Questions

What area does Highmont Glass cover?

We basically cover the state of Victoria for any onsite work and have covered other states in Australia and other counties including Canada and the UK for deliveries other items.

How Is Glass made?

Glass is a made by melting a mixture of sand and other minerals in a furnace at temperatures of 1700 degrees Celsius.

Silica in the form of sand is the main ingredient of glass, and this is combined with soda ash and limestone in special pots which are placed into the furnace. Broken, recycled glass known as ‘cullet’ is added to the ingredients to speed up the melting process. Other materials can be added to produce different colours or properties. For example, adding the minerals cobalt or sulphur will produce coloured glass.

A recipe for glass:
sand or silica (SiO2)
sodium carbonate (Na2CO3)
limestone (CaCO3)
magnesium carbonate (MgCO3)
additives to improve the quality of the glass, and to colour the glass.

While it is still molten (a hot liquid), glass can be manipulated by glass blowers to form bottles and other decorative articles. They blow air into the liquid glass through a long pipe.

In factories today, bottle blowing machines produce bottles and jars by pressing and blowing the molten glass inside a mould. Flat glass is made by floating the molten glass onto flat beds of tin. Glass can also be coated, heat-treated, engraved or decorated. It is used to make optical fibres for use in medicine and for parts for modern communications.

History:
According to the ancient-Roman historian Pliny (AD 23-79), Phoenician merchants transporting stone actually discovered glass (or rather became aware of its existence accidentally) in the region of Syria around 5000 BC. Pliny tells how the merchants, after landing, rested cooking pots on blocks of nitrate placed by their fire. With the intense heat of the fire, the blocks eventually melted and mixed with the sand of the beach to form an opaque liquid when cooled down becoming glass.