Some figures on the last Glasstec.


The show held in October 2018 in Dusseldorf saw a growth of almost 5% in the number of visitors, slightly lower than the records of 2012 and 2014.


The show is truly an international fair with more than 70% of visitors coming from abroad.

On the other hand the number of exhibitors is in withdrawal (figures not given by the organizer) with some hall not completely filled

There are no translations available.


Vente société installation de miroirs sur le marché du sport



Une petite société qui vend et installe sur toute la France des miroirs destinés à des applications sportives est en vente. Quelques informations supplémentaires sur le lien suivant.



Vente et installation de miroirs sur le marché du sport


Je reste à votre disposition si vous souhaitez plus d'informations ou rentrer en contact avec le dirigeant de cette société. ou 06 64 73 63 77

New options for Battellino robot for double glazing


- BAR CODE READER: this allow to the customer to create bar codes that can give the machines all the information about: Type of frame ( aluminum stainless steel) thickness of the 1^ 2^ and in case of triplex 3^ glass; Thickness of the frame; information if the glass is a simple double of a triplex.

- SHAPED GLASS a special environment on the panel ( see attachments) allow the customer to choose from different kind of shapes of glass to work.

- MONUMENTAL GLASS opportunity to work also frames of only 4 mm, this device is particularly interesting for the companies that work with restoration of old buildings. Really interesting because this kind of glasses are really difficult to job well also manually.

-SPEED faster then in the pass the new version runs at 18 mt/min also the working of the corners was modified to run faster ( a glass of 100x80cm can be done in approximately 45 sec.

- NEW TOUCH SCREEN PANEL if in the older machines were equipped with a commercial PC, the new models are equipped with an Industrial panel, more powerful and more reliable, like in the past, also this new touch can be delivered in the language of the customer.

- NEW PUMPS thanks to a new supplier that helped us creating with us a special pump for our robot we have had the opportunity to offer the robot with a better price

- 4.0 MACHINE the machine can be certificated as 4.0 industrial machines that means higher score to access to European founds.


For more information glass@comascotec.


Technical news for Battellino Italian machines manufacturer

- STRONGER INLET AND OUTLET ARMS we change the system of inlet and outlet conveyor to allow to our machine to can sustain more weight following the requests of our customers.

- NEW GASKET SYSTEM  to help our customers to maintain in better conditions their machines, we modified the gasket set of our spindles, to avoid more and better any problem of leak of water.

- NEW WIDE TOUCH SCREEN we improved our machine with a multilingual wide touch screen. The panel, equipped with our new software divided into environments,  gives to the operator the opportunity of set easily the speed of work, the thickness of the glass, the operations of the pneumatic motors and the working of the water pump moreover shows to the customer , the total and partial meters worked by the machine, the way of working of the machine in each phase of work, helping him also in the maintenance of the parts.

- NEW SYSTEM OF GUIDES FOR THE DIAMOND AND POLISHING MOTORS,  a new system of guides for the motors give them more stability to improve more possible the quality of the glass.


More information on


Glass chemical tempering


1/Reasons and advantages for glass chemical tempering

The chemical tempering is used when the thermal tempering meets limits.

Small glass thickness

Even if some suppliers offer now machines able to temper 2 mm thickness glass, the chemical tempering in this case give better results.


Curved glass

The chemical tempering is done with a temperature around 400°C which don’t change the glass geometrical shape

This is particularly important when the curved glass has to be laminated after tempering.

The optical quality

Chemical tempering gives better result than thermal tempering when a high optical quality is required.


When a more important hardness is required than the one the thermal tempering can supply.

With the chemical tempering it is possible to increase with a factor 4 the hardness in touch with the thermal tempering.

No surface distorsions

With chemical tempering you do not have surface distortion

Processing after tempering

One of the advantages for chemical tempering is that you can process the glass (drilling, edging, polishing, sandblasting, cutting…) after tempering. This is not possible for thermal tempering.

On another side with chemical tempering it is more difficult or even impossible to temper very large glasses, because the maximum furnaces dimensions (around 3200x2200).

More important in case the glass breaks, they remain very dangerous large glass pieces. For this reason, only glasses coming from thermal tempering can be accepted as “safety glasses”

2/Glass thermal tempering characteristics

The idea for chemical tempering (like for thermal tempering) is to put the glass surface under compression to increase strongly the hardness. In the chemical tempering case it is obtained by the migration at the glass surface (between 20 and 100 micrometers) of big potassium cations which take the cations sodium place. Sodium and calcium having similar chemical characteristics this change does not modify the glass properties.

This change is done dropping the glass inside a potassium salt bath between 12 and 20 hours. The salt bath temperature is around 400° Celcius.

Chemical tempering salt bath


3/Comparison between thermal and chemical tempering



Thermal tempering

Chemical tempering

Thickness (mm)

3 à 19

0.5 à 19

Surface compression ( N/mq)



Thickness for the compressed area

20% from the glass total thickness

20 to 120 microns

Flexion resistance           ( N/mq)



Pieces dimensions when glass breaks

Small pieces

Large pieces

Processing after tempering




Yes (cutting, drilling, edging, polishing, sandblasting…)




4/The main chemical markets

The cost for chemical tempering is much more important than the one for thermal tempering. So the main markets for chemical tempering are where the thermal tempering meets limits or problems.

-Small thickness

-Quality (distortion, optical quality, hardness..)

The markets for chemical tempering is in aviation, space and naval industry, automotive industry, luxury, architectural (bending) and in general when you need nos distortion.



Chemical tempering is another way to glass tempering, mainly when thermal tempering can bring a proper solution. But to be able to reach the quality required chemical tempering must be done in automatized furnaces and with security and checking systems to supply with productivity the high quality level required.