100 years for the Charles Costa mirror shop

 

 

 

For 100 years, each of the 4 generations has seen their father invest in the Charles Costa business, without counting his time, deploying a lot of effort and always with passion

 

We are happy to celebrate this year the extraordinary anniversary of our centenary.

 

Be sure that the satisfaction of our customers will always remain at the heart of our priorities as well as the respect of commitments with our partners.

 

I join with all my colleagues in presenting to you our best wishes for health, success and serenity for this new year 2020.

 

 

There are no translations available.

Sarthe. L’entreprise Grav’Or ce week-end à l’Élysée

L’entreprise mancelle de gravure sur verre, fait partie des 100 entreprises sélectionnées pour l’exposition « Fabriqué en France » qui se déroule les 18 et 19 janvier 2020 à l’Elysée.

Les samedi 18 et dimanche 19 janvier 2020, 100 entreprises françaises – sélectionnées parmi 1 750 dossiers – présenteront le savoir-faire « Fabriqué en France » de 100 départements français, à l’Élysée. L’entreprise mancelle Grav’Or a été retenue pour représenter la Sarthe.

Nommée aux Talents de la Sarthe 2018 dans la catégorie « entreprise », la société de miroiterie et décoration sur verre présentera ce week-end un paravent avec gravure à la main, feuille d’or et laquage en églomisé précise le site de l’Élysée.

 

Convergence of machines for stone and glass

The arrival of industrial synthetic materials on the stone market has surprising consequences on the machinery market. In fact, we see appearing from certain suppliers who are both on the glass and stone market on the stone machinery market, machines that were once exclusively used on the glass market.

 

Mainly for two reasons.

 

1 / These new materials are calibrated in thickness.

So we see machines appearing for polishing the edge (Bavelloni, Intermac, Bovone) similar to those used for glass (rectilinear, double edger).

 

The gain is much better productivity for running in and polishing the edge.

 

2 / Some materials are based on glass

 

We are witnessing the arrival of cutting systems from glass much more productive and easy to use (cutting tables, at Bavelloni, Intermac ...)


There are no translations available.

Miroiterie en vente

 

Perspective départ en retraite une miroiterie de façonnage avec activité menuiserie aluminium et PVC est disponible à la vente.

L'entreprise dont le dirigeant est très connu et présent  sur le marché depuis de nombreuses années  possède un parc machines diversifié et est située dans une ville importante du Sud-Ouest.

Parc machines avec table de coupe, rectiligne, perceuse, machine à bandes...

Equipes de poseurs indépendants.

 

Pour plus d'informations glass@comascotec.com ou 06 64 73 63 77. Merci

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Heak soak test

 

After tempering the glass can break spontanuously. This break is due to very small impurities (very often nickel sulfite) inside the tempered glass. Depending where there are (on the surface or deeply inside) the glass can break or not a long time after tempering.

 

During the tempering (between 610° and 660°) the nickel sulfite NiS takes a not steady crystallin structure at normal glass using temperature. It is the changement to a steady crystalline structure (can be a long time after tempering) for the NiS which creates tension inside the tempered glass and the break.

This break can be very damaging (the glass has to be replace) and dangerous for people.

To prevent this, a destructive test has be created: the Heat soak test.

The idea is to create inside a furnace the conditions which can bring the critical glass to break very fast (inside the furnace or just after)

 

 

The glass to test are send inside a special furnace where there are heated up to around 290° Celcius and slowly cooled;

The total time for the test depends on the glass thickness

 

These conditions cause the impurities volume growing and the break of the glass in case the nickel sulfite impurities are present

This test is not 100% reliable. But he decreases drastically the number of spontaneous breaks.

The cost for glass supplied with Heat soak test is around 25% more important than the normal tempered glass.