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.



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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 ...)

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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



The different glasses


From the float glass different glasses are manufactured.

-Printed glass

Before to be completly cooled the glass sheets are sent between two engraved rolls allowing "to print" different designs on the glass sheets. More often the printed glass is also a coloured glass.

Printed glass exemple

These glasses are mainly used for interior decoration (doors, shower panels, offices partitions...)

-Armoured glass

Inside the glass is included a metallic framework.

The applications are for the security market

-Sandblasted glasses

The " sand "   sent under pressure on glass sheets removes the transparency ( removing on the glass surface from some microns up to some millimeters)

It is possible to sandblast all the glass surface or protecting some area to design geometric or artistic drawings on the glass.

The glass sandblasting is a very dynamic area.


Door with sandblasted glass

( Company Signal décors , France 54). Proposed with double glazing.



Other exemple with a building with the Joconde face . ( Signal décors)




The glass is coated on one side with silver nitrate allowing it to mirror the light.


-Engraved glass

On its surface the glass is engraved with a wheel to obtain a geometrical or artistic drawing.



On the left an engraved glass with some ohter processed glasses.


-Coated glass

It is the more important innovation for the last 10 years. On one of two face the glass is coated with mettalic or chemical coating allowing the glass to obtain specific properties.The thickness for this coating is some ten or so nonometer.

The more common coated glasses have minimum 6 coats, but some  other can have more than 20 (automotive glasses)


-No reflection glasses

On the common glasses it can have reflection on the two glass faces from different things in the glass surrounding. This reflection decreases the glass transparency. To prevent this the two glass faces are coated with a metallic oxide. These glasses are mainly used in presentation windows (museums), protecting glasses for painting....

-Anti-condensation glasses

The glass from your glasses is a coated glass with anti-condensation coating.

-Self-cleaning glass

Lodged on the windows titan oxide coating is a catalyst allowing to destroy dust and organic particles, with the sun effect. And after the rain will remove the small particles remaining on the window.

-Glass against bacterium

This glass allow to kill bacterium. The idea from  AGC, the first supplier to propose such a glass was to eliminate up to  99,9% of the bacteriums.

-Low E glasses

tTo reflect the infrared light to keep the heat outside during the summer and inside during the winter.

-Hydrophobic glass

The glass prevents the water to remain on the glass (for exemple for plane windscreens).

These glass were designed from lotus leaves study.



The coated glasses are generally designed with several coats.

-One to hang the coating on the glass

-Several coats to give to the glass the wanted suitabilities.

-One to protect the coating




Laminated glass