Bending Glass

The thermal hardened curvature

Tempered glass, or also called tempered glass, takes its name from the manufacturing process to which it is subjected, the tempering precisely.

The manufacturing process technically requires that the glass is inserted inside a furnace where the temperature reaches 640 °.

Subsequently the glass is moved to an open place where it is blown and cooled thanks to jets of air coming from several directions: in this way the surface of the glass, both upper and lower, hardens while the interior cools more slowly, as it remains in traction.

On the other hand, in curved hardening the bending process ends with instant cooling in order to obtain a particularly resistant product eliminating the risk of breakage due to thermal shock.

With regard to the plants used for tempering bending, they can be of the press type, with the glass in contact with the mold to obtain variable geometries, and with rollers for any other type of radius bending. The maximum achievable dimensions for regular radius bending over 1000 mm are: 2500 mm x 4500 mm.


The advantages of curved tempered glass

The tempering process allows to make the glass more resistant and elastic and, in addition to this important advantage, it has:

  • greater resistance to breakage compared to an unhardened glass sheet;
  • greater resistance to high temperatures;
  • greater mechanical resistance;
  • greater resistance to pressure.

Tempered glass is also appreciated for the “safety” factor.

In fact, when the tempered glass breaks, unlike a classic glass plate, it is destroyed in many small pieces with rounded and rounded edges: this significantly reduces the risk of injury and cuts.

According to the European Standard UNI EN 12150, which defines the conformity assessment index during the tempering process, roughly forty fragments should be counted when breaking a small sheet of tempered glass of about 5×5 cm with a depth of 6 mm.


How to recognize curved tempered glass

The elements that allow to distinguish curved tempered glass from an unhardened one are:

  • the word “Tempered” stamped on the glass, in most cases, near the corners;
  • the corners are completely rounded and rounded and if the tempered glass is viewed through special polarized lenses it is possible to notice blue bands that cross the entire surface;
  • the presence of undulations and distorted images of the surrounding environment. This distortion effect, as well as the presence of waves, is linked to the way in which the thermal hardening process is performed: the glass plate is placed and heated on rollers and this causes the effects just described once the processing is finished.


Curved tempered glass: TF VETRITALIA processes

The characteristics and advantages of curved tempered glass make this product incredibly versatile.

TfVetritalia carries out work for the appliance sector, interior and exterior architecture, for the naval sector, for flat and curved showers and refrigerated counters

Our company combines years of craftsmanship experience with advanced technologies, and just thanks to this we are able to satisfy all the requests of our customers.

If you want to discover all the applications of curved glasses scroll the list below:

Our Company and all the staff will be pleased to help and suggest you the best glass products for your projects or needs.

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