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All you need to know about getting BIS / ISI for toughened glass

Toughened glass, or safety glass, or tempered glass is ordinary float glass that has been made force-resistant and hence, this type of glass is six times as hard to break as ordinary glass panes. Moreover, if the glass does indeed break, it will break into small, blunt, cube-shaped pieces due to stress patterns within the glass. In a nutshell, nobody gets hurt.

How is Toughened Glass Made?
There are mainly two ways in which glass can be toughened –
Tempering Glass with Heat and Cold

Most toughened glass or safety glass is made by tempering, a process in which ordinary glass is heated up to a temperature of around 620°C for some time followed by abrupt cooling using jets of cold air. As a result of this process, the outside of the glass is forced into compression while the inside remains free to float for some time (creating tension on the inside). The higher the thermal expansion of the glass and the lower its thermal conductivity, the higher will be the level of residue stresses, and as a result of this, the stronger will be the resulting glass.

Tempering Glass with Chemical Reactions

Normal float glass is submerged in a bath of potassium salt at 300°C. When the salt dissolves, it is indicative of its separating into ions. The potassium ions are now free to replace sodium ions in the surface of the glass. Potassium ions are 30% larger than sodium ions; the process brings the outer surface under compression while the inner surface remains the same. This creates a tension inside and now the force required to break the glass has to be much greater (more than the compressive forces). Hence, this method aims at strengthening the glass by chemical ion exchange.

Types of Toughened Glass

There are mainly five different types of
toughened glass in existence. They are –

  • Clear toughened glass
  • Laminatedtoughened glass
  • Reflectivetoughened glass
  • Tintedtoughened glassand
  • Frosted toughened glass
Why choose Sun Consultants for guiding you to get BIS / ISI for toughened Glass

We, Sun consultants and engineers are a reputed name in the industry of BIS / ISI Consultancy services for Toughened Glass. We have server for more than 500 companies as their premier choice for getting their BIS Consultancy services. We are specialized in offering consulting services on Toughened Glass BIS and ISI mark. We are a team of highly qualified professional having in-depth knowledge on the process of getting ISI for toughened glass, We have guided many of our clients across India on getting their BIS for toughened glass.

Advantages of Toughened Glass
Tempering of glass has a lot of benefits –
  • Toughened glass is about to 6 times stronger than normal float glass. Moreover, the process of tempering does not affect any other property of the glass. Hence, with the same visible light transmission as normal float glass comes simply greater strength
  • Toughened glass is able to withstand massive differences in temperature (of up to 250°C) whereas normal float glass can handle only up to 40°C
  • Tempering of glass renders it difficult to break and even when it does due to whatsoever reasons, it will fall apart into very small, blunt, cube-like pieces that do not cause fatal injuries
  • Toughened glass is highly resistant to electric and thermal shock
  • Its high durability makes frequent replacement redundant. Hence, the glass can easily be used for a long, long time