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Poste de poseur miroiterie Charignon


Dans le cadre de son développement, la miroiterie Charignon, recherche des menuisiers poseurs (H/F)

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Ce poste, est disponible immédiatement sur le secteur Couzon au mont d’or (69). 35h sur 4 jours (7h45-12h30 / 13h30- 17h30) - Rémunération intéressante entre 2000 et 2600 Brut + primes + mutuelle prise en charge à 80% Rejoignez notre groupe à taille humaine où nous visons l’excellence et l’exemplarité, dans une ambiance détendue, où nous avons à cœur de favoriser votre réussite professionnelle.


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Pyroverre acquires the Cluzel mirrors in France

Pyroverre is a glass products processor based in Châteauneuf-du-Rhône (Drome), storer and distributor of fire resistance glasses from Pilkington (NSG group) for the southern part of French territory.
The company, created in 2010, is specialized in the transformation of Pilkington Pyrostop and Pilkington Pyrodur glass products. She cuts custom glass for a clientele made up of mirror makers and carpenters. Its design office is dedicated to specific customer requests to ensure compliance with fire regulations.
In 2015, the Côté Verre company, founded by Maryline Pereira, joined the group to offer online sales of all types of cut, shaped and then shipped glazing from the production workshop. The online configuration tool makes it easy for customers to order on the site.

Why the Cluzel mirror?
We asked Mathieu Guenin, manager of the company, to explain the reasons for this takeover. Mathieu Guenin and Maryline Pereira know that the implementation is the continuity of Côté Verre's activity, the demand from local customers being recurring and increasingly important. They then form an installation team. They quickly realized that it would be easier to do an external growth operation. They are interested in a possible acquisition and have found the miroiterie Cluzel in Montélimar, near Châteauneuf-du-Rhône. The manager, Danielle Fargier, wanted to retire. She was assisted by Eric Coin on a technical level with solid know-how.
The company's equipment allows for the cutting, shaping and drilling necessary for simple mirror-making operations. It has a van with a glass-holder gantry. The store has an area of ​​80 m2 and the workshop of 160 m2.
The clientele consists mainly of individuals and professionals as well as local administrations.
Integration and transformations
The takeover took place at the end of January 2021. Mathieu Guenin recruited Paul Fabre as agency manager as well as Dorotea Nacasabog as sales assistant. Dannielle Fargier will accompany them for three months to pass on his knowledge to them, while Eric Coin will continue his consulting, cutting and glass installation activity.
The existing store will host a new showroom in the form of a show apartment to enhance the offer of the mirror by presenting the products in situ. Railings, kitchen splashbacks, a floor slab, a staircase and a dielectric mirror hiding a screen. The turnover of around 300,000 euros is expected to rise to 600,000 euros.
Although the health crisis has slightly impacted Pyroverre's activity due to the shutdown of construction sites during the health crisis, Mathieu Guenin remains optimistic and believes that the French economy will rebound rapidly. At the same time, online sales via the Côté Verre site are experiencing significant growth, explains Maryline Pereira.


New float in France

The Glass Trösch group will invest in the construction of a new furnace at its French site in Homboutg to replace the current furnace from 2008 which was reaching the end of its life.
In addition, an extension of the site to 45,000 m² is planned.

Production from another site will also be transferred there during 2023, with the arrival of 80 employees.

Diamond resin wheels improving


    The wheel is lighter, resulting in less stress on the spindle

    The slats on the base have been specially designed so that the water is sprayed, and there fore reaches the point of contact between the grinding wheel and the glass uniformly and in the best way possible

    The material ensures greater rigidity and therefore more direct transmission of pressure levels set by operators

    The base guarantees perfect balance of the grinding wheel.

lAl these new features don’t definitely affect wheel quality in terms of bonding, that is still the same, but they simply improve performances from a mechanical point of view

More info 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.