Silica sand is the primary source of silicon dioxide that is essential in the manufacture of glass. To be suitable for producing glass, there must be a very high proportion of silica (above 95%) in the composition of the sand.
That’s why most sand deposits are not of sufficient purity for glassmaking. It’s estimated that industrial sand that meets the extremely high chemical and physical requirements of the glass industry represents less than 1% of the 50 billion tonnes of sand that is extracted every year.
The reason for these demanding requirements is that the purity of the sand directly impacts the transparency, strength, and durability of the glass. For example, only glass products that are manufactured with high-quality silica sand can meet the optimal vision requirements for vehicle windshields.
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Similarly, only building glass that’s made using high-quality silica sand can meet the light or thermal transmittance specifications without compromising on durability and safety.
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