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


Glass story : the first steps


In the nature the glass exists :

-It can come from :


The obsidian (generally green or black) has been used during the prehistory (the oldest tools with obsidian has been manufactured 100 000 years ago) and changed in tools, weapons, jewels, mirrors (inside which it was possible to see his own soul!)

Obsidian piece.


Obisidian knive.



Obsidian jewels


-from meteorites



When a meteorite drops on sand

-From the lightning, when a lightning flash touches sand



Every time glass is created it is because there are extreme temperature and pressure conditions.

But a lot more amazing is that glass is also synthesized  in very large quantities in ocean by seaweeds or inside some sponges skeletons.


Yes it is glass!


Seaweeds called "diatomés" have a very delicate glass shell. The glass synthesis is done here by a chemical reaction.




The glass production from seaweeds is huge, a lot more important than the industrial production.

This organic glass is also called "opale" used in jewelry




Two Opales samples.


But the oldest glasses have been discovered on ….the moon during the Apollo missions.


Glass discovery:

The glass was discovered by accident during metal working or inside potter’s furnaces.

The metal working is going to remove the glass from the weapons or tools using to focus it in jewelry, decoration or religious using.


The oldest glasses coming from human work are from 3000 years before JC. Some small statues, beads and jewels were found in Middle East.

During this period the glass is not transparent because the impurities remaining inside the glass.