Tempered Glass

Tempered Glass or Toughened Glass is made by processing normal annealed glass. The glass is subjected to heat till its softening point & then rapidly cooled in a controlled atmosphere.

A fully tempered glass is 4 to 5 times stronger than a normal annealed glass of similar thickness & size A fully tempered glass is considered as a safety glass as it will disintegrate into small & blunt pieces when broken, therefore reducing the probability & degree of injuries. Tempered glasses can also withstand high temperature differentials as compared to non tempered glass thereby reducing thermal breakage.

Toughening process does not change the light transmission and solar prosperities of the glass. However tempered glass cannot be cut or altered. Therefore, it is made as per the requirement of the customer and all cutting, grinding, holes, cut outs, etc has to be done before the tempering process.

Normal Glass Shattered

Tempered Glass Shattered

Laminated Safety Glass


  • 1) Glass cannot be cut or altered after tempering.
  • 2) The raw material used in the manufacturing of tempered glass are not free from certain defects, like Nickel Sulphide inclusions, which put tempered glass at potential risk of spontaneous breakage.
  • 3) Waviness & bending.
  • 4 Tempered glass has some roller marks and more distortion than annealed glass.
  • 5) Tempered glass as single glass should not be used for critical applications like overhead glazing where humans may walk.

Key Benefits

  • a) Strength
  • b) Safety
  • c) Edge Strength
  • d) Resistance to thermal breakage

Laminated Safety Glass

Heat Strengthened Glass

Heat Strengthened Glass or HS Glass is a Semi Tempered Glass. The process is similar to that of tempered glass, and differs only in the cooling method. HS is cooled less rapidly than tempered glass.

HS Glass is two times as stronger than annealed glass. However it has lesser optical defects & bending them tempered glass. It is therefore used in applications like windows where you get better optics than tempered glass & better strength them normal glass. It is also used for making laminated glass.

However, we should make a careful assessment of the application before using HS Glass.

    Laminated Safety glass :
  • As the name suggests laminated glass is made by permanently bonding 2 or more panes of glass using layers of Poly Vinyl Butyl (PVB). Laminated glass is considered to be the best in safety glass. It also gives better acoustic insulation as well as protection from UV radiation as it cuts almost 99% of UV radiation present in the sunlight.

    Benefits :
  • A) Safety.
  • B) Security.
  • C) Sound Reduction.
  • D) U V control.

Heat Strengthened Glass


Double Glazed Unit or Insulated Glass Unit is made up of two or more glass panes, with dry air or gasses, between them.

Double Glazed Glass