More visibility – less energy wasted

Industrial hot processes have one thing in common: they need viewing panels for optical control and monitoring. As large as possible. So that you can see all the details. As small as possible, so that heat loss is kept within limits. How to solve this dilemma? With an infrared (IR) reflective coating on transparent NEXTREMA glass-ceramic from SCHOTT:

The coating applied to one side of the glass-ceramic reflects the heat radiation back into the process and thus can significantly reduce heat loss, compared to an uncoated NEXTREMA pane. The degree of IR reflection depends on the wavelength of the heat radiation. The coated glass-ceramic is available in different shapes and formats and sets hardly any limits to the free view of the processes.

Which hot processes do we have in mind?
We have a few more ideas, for example

  • Soldering ovens in electronics production
  • Drying ovens
  • Tempering furnaces
  • Annealing and hardening furnaces
  • …and countless other applications that you can probably think of right now.


Let’s talk about it!

You can find more information here on our website.

Applications in detail

Grilling on glass-ceramics

Our stylish grill plate, made of the high-performance glass-ceramic Nextrema from Schott, proves that a part that looks simple at first glance can be quite complex:

  • Temperature resistant up to 920 °C
  • Virtually no thermal expansion: can withstand temperature shocks of up to 800 degrees
  • High permeability for thermal radiation
  • Chemically inert – does not react with the food to be grilled and is therefore easy to clean
  • Resistant to acids, alkalis, corrosion
  • Mechanically very robust (impact resistant)

Vorderseite Nextrema
Glass Ceramics
In this example:
rectangular, 300 x 265 mm with rounded corners. All edges grinded.
Alternatively, also as a round disc (diameter 340 mm, e.g., for the Weber-Grill pizza stone or 445 mm as in the video with Andreas Meier). Nextrema glass- ceramics, 4.8 mm thick. Still light, but very robust with optimum heat distribution. The scraper for quick primary cleaning is always part of the delivery
Rückseite Nextrema
Glass Ceramics
The grooved side – ideal for steaks, sausages ... Glass-ceramics is impact-resistant and mechanically very robust. Roughly clean with the scraper while it is warm and then simply rinse - done! (see video of the Grillsportverein Oberpfalz) The smooth side – for bacon, fish, fried eggs ...

You can find more information and videos on this fascinating material here on our website.

Grilling on glass not only ensures good heat distribution and the best roasted aromas. Above all, no harmful smoke from half-burned fat condenses on the food to be grilled. Got curious? You can find detailed test and experience reports on the website of the BBQ.LOVE grill portal or with “our top chef from Upper Palatinate” Andreas Meier on the Facebook page of Schlossbrauerei Fuchsberg. The Grillsportverein Oberpfalz e.V. has also extensively tested the grill plate.


If you’ve got a taste for it now: You can order the glass-ceramic grill plate directly from us. Rectangular or round. In standard dimensions or in your desired format. As a single item, as a promotional gift or in series for your products. But always with the right scraper for quick primary cleaning. Just send an email to!

Ask the Irlbachers

Hartmut P.: “Frequently, I come across the term ‘glass frit’. What is that?”

Alexander Stoppa, Technical Manager

The base material for glass frit is finely ground glass, for example from cullet of our production. If you “cook” this glass powder at about 750 °C, it melts on the surface; the powder particles “bake” together. At this temperature, glass does not yet become molten; therefore, wine or window glass cannot be formed from the “baked” glass frit. Materials engineers generally refer to such “baking processes” as “sintering”.

If the backed glass frit is quenched, the result is a porous material that is well suited as a filter in laboratory technology or the process industry. If this material is ground, we also refer to the resulting powder as glass frit.

For Irlbacher, glass frit is important in two ways: as an essential ingredient in both the ceramic inks and the metal pastes we use to print electrical circuits on the glass. After all printing processes, we “bake” our blanks in the toughening furnaces. During this process, the glass frit fuses inseparably with the tempered safety glass. The inks, circuits and glass form a monolithic, substance-to-substance bonded composite.