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PRESS GLASS SA
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Toughened glass

Glass is naturally fragile. Thanks to the toughening process, the internal stresses within its structure change, which results in an increase in its bending strength. Toughened glass means safety. When it breaks, the pane is shattered into tiny pieces with blunt edges. This characteristic makes toughened glass particularly suited for use in highly sensitive places, with a high risk of being broken or exposed to high insolation – which means a big increase of internal thermal stresses.

Advantages

reduces the risk of injury in the case of the pane breakage

Protection against injury from breaking glass

In order to prevent such danger PRESS GLASS proposes 2 types of solutions:

  • laminated safety glass, which thanks to its construction remains in its frame or bolted elements after the impact of a blow or smashing
  • hardened glass ESG, which after being hit breaks into small particles of blunt edges

All toughened glass units on offer fulfil the norms of PN-EN 12600 specifications.

it has greater resistance to bending in comparison to ordinary glass

High level of resistance to bending

Architects are still searching for more aesthetic materials which are used to make supporting elements. Glass constructions are also becoming more commonly used as supporting elements. Glass fins, glass stairs, glass floors are only a few examples of such applications. All these possibilities came into being thanks to the development of methods regarding tempering glass. From this onwards construction elements made out of monolithic glass can be put under significant strain of bending and pressurizing.

resistant to thermal shock

Resistant to thermal shock

Glass is naturally fragile. Thanks to the hardening process, the internal stresses within its structure change, which results in an increase in its bending strength. This characteristic makes hardened glass particularly suitable for use in highly sensitive places, with a high risk of being broken or exposed to high insolation – which means a big increase of internal thermal stresses.

Market offer includes glass:

with holes and cuttings
with holes and cuttings
with chamfered, ground or polished edges
with edges that have been bevelled, grinded or polished
rectangular, polygonal and arch-shaped
with right-angled shapes, multi-angled shapes, arch-shapes
covered with silicon coatings and enamelled
covered with silicon coatings and enamelled
Silk screen printed
silk screen printed
in the shape of single formats or double or triple glazing
in the shape of single formats or double and triple ...
Toughening
type
Glass thickness
[mm]
Minimum dimensions
[mm]
Maximum dimensions
[mm] T-thermofloat
Standard 4 100×250 1700×2500 (T:1500×2500)
5 100×250 3200×7000 (T:2300×3800)
6-19 100×250 3200×7000

Directional hardering

An inseparable component of the toughening process is the so-called glass waviness. PRESS GLASS informs all customers that this effect can occur, in order to be fair in service. The waviness effect is of particular importance if glass panes are assembled in building facades, especially with big glazed surfaces.

It is visualised by a distortion of the view reflected in the facade. To decrease the distortion effect of a reflected picture, it is suggested that directional toughening is made. It means that e.g. in the case of toughening along the height, waviness will occur perpendicularly to this dimension.

Heat strenghtened glass

Heat strenghtened glass differs from the toughened glass by the kind of breaking netting, which occurs during glass panel damage. Due to its breaking characteristic, the panel assembled in the frame stays there after the damage, which protects against injury.

Thanks to this feature, TVG is starting to become interesting as an alternative for toughened. However, heat strenghtened glass is not counted among the types of safety glass.

Glass thickness
[mm] T-Thermofloat
Minimum dimensions
[mm]
Maximum dimensions [mm]
4 200×450 1700×2500 (T:1500×2500)
5 200×450 3200×7000 (T:2300×3800)
6-12 (T:6-10) 200×450 3200×7000

Heat Soak Test

The manufacturing process of float glass is done by the smelting of separate ingredients. Molten glass is poured out in special baths, and then formed to the required thickness in a floating process on the surface of melted tin, where it cools down. There exists a risk during this process that inclusions of nickel sulfide will occur. This phenomenon causes an increase of internal stress in the hardened glass, which could finally lead to self-breaking.

Even though this phenomenon occurs extremely rarely, one must allow for this possibility. It is suggested that the toughened glass is put under pre-heating process, during which the glass panes which have pollution content are eliminated from the shipment. PRESS GLASS Company offers the possibility of carrying out an extra glass check by means of the Heat Soak Test method.

Heat Soak Test (HST)

See more

Machining of edges

with chamfered, ground or polished edges

Depending on the customer’s request, before starting the toughening process, the glass must undergo the machining process i.e. cutting, drilling, grinding or grinding and polishing together. Safety glass which is tempered, undergoes checking according to the standard EN 12150- 1. Hardened safety glass produced by PRESS GLASS can not undergo further machining.

All requirements have to be presented together with the order for tempered glass. If there is no additional description all hardened glass panes up to 8mm in thickness are produced by PRESS GLASS with blunt edges (it is included in the price). Glass panes which are thicker than 8 mm have matt grinded edges (grinding is not included in the price and should be added to the price of tempered glass).

Movies

Tempering of glass

Verification of hardened glass by HST

We constantly modify our manufacturing processes and change habits to limit the negative effect on the environment.

In order to facilitate the changes, we have adopted ISO 14001, the worldwide management system for environmental protection.

Read more

© Copyright - PRESS GLASS SA 2019
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  2. The entity placing Cookies on the user's device and having access to them is the Controller, Press Glass S.A., with its registered office at ul. Kopalniana 9, 42-262 Nowa Wieś, Poczesna commune, entered into the National Court Register by the District Court in Częstochowa, 17th Commercial Division of the National Court Register under number 0000131477, using Tax Identification Number NIP 574-000-74-96 and Business Statistical Number REGON 150021158, share capital of PLN 500 000 (in words: five hundred thousand zlotys 00/100), paid in full, represented by the Management Board – in accordance with a valid legal authorisation.
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I express my voluntary consent to the processing of my personal data including the automated analysis of my activity on the www.pressglass.uk website, in order to determine my potential interests for the purpose of adjustments of advertisement and commercial offers according to my preferences by Press Glass S.A. (hereinafter referred to as: the "Controller" and/or "Press Glass"), with its registered office at ul. Kopalniana 9, 42-262 Nowa Wieś, Poczesna commune, entered into the National Court Register by the District Court in Częstochowa, 17th Commercial Division of the National Court Register under number 0000131477, using Tax Identification Number NIP 574-000-74-96 and Business Statistical Number REGON 150021158, share capital of PLN 500 000 (in words: five hundred thousand zlotys 00/100), paid in full, represented by the Management Board – in accordance with a valid legal authorisation, also via the www.pressglass.uk website, pursuant to Article 6 sec. 1(a) in conjunction with Article 22 of Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC – General Data Protection Regulation, (OJEU L of 2016, No. 119, item 1).

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