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

Banner
Banner
Banner
Banner

 

Information

This introduction is for no professional person. It is only a first step to better understand this material.

For professionals or to have deeper information you can have a look on the following web sites.

 

www.verreonline.fr

www.verre.org

www.glassalia.com

www.infovitrail.com

www.saint-gobain-vitrage.com

www.pilkington.com

www.agc-flatglass.eu

www.yourglass.fr

www.idverre.net

Article from Jean-Claude Lehmann ( Saint-Gobain).

 

The glass

Considering the chemical composition it is possible to consider 3 different glasses.

The sodo-calcic glasses

The boro-silicat glasses

-The vitro-céramique glasses

 

The sodo-calcic glasses are mainly used in architectural markets.

The boro-silicate glasses, due to the low distention coefficient, are present on markets where are important temperature differences and with contact with fire

A very well-known trademark on this field is Pyrex.

The vitro-céramique glasses, with also a low distention coefficient are present in household appliance (oven doors, cooking plates, chimneys…)

 

This important difference in the chemical composition has results in their properties and using areas. Silica represents between 50% and 90% of the total composition.

Moreover :

-The sodo-calcic glasses have additions of calcium and sodium oxides.

-The boro-silicate glasses have boron oxide.

-The vitro-céramique glasses have aluminium oxide.

There are other oxides (Baryum, Lithium, Magnesium, Potassium, Zinc, Titan….) each giving a specific property, (color, melting point, chemical resistance, mechanical properties..).

A very interesting thing is that the glass compositions have not very different between to-day and 1600 years ago.

The flat glass is mainly used :

-70% in architectural

-20% in automotive

The car we have dreamed when we was a child

 

Is not exactly the same we drive to-day.

 

-10% in décoration and appliance

 

In architectural and automotive is required the more perfect transparency for the light and the weakest transparency for infrared light, because the solar energy is carried by infrareds (to minimize the increasing of temperature inside the building or the car). Infrareds carry also, during winter, the heat to outside and increase the energy used for heating.

Adjusting the glass chemical composition the more important flat glass suppliers Saint-Gobain, PPG, Pilkington, AGC …) succeed to manufacture such glasses.

Glass is transparent, but you can see that, in fact, it has a green colour (due to iron presence) more obvious for high glass thickness (more than 12 mm).

This green colour can be removed with manganese or selenium addition.

The glass can be also coloured.

Cobalt gives a blue colour

Selenium in large quantities gives a red colour

Copper oxide gives a turquoise colour.

With Nickel depending the concentration you can obtain a large colour range from blue to black

With tin you have shadowed white

With iron you can have, black, brown or green

With Titanium black yellow

With gold several different yellow

With uranium addition from yellow to fluorescent green

With Silver nitrate from orange to yellow

 

 

Colored glass from Egypte, around 600 years before JC

 

The colors grades are also depending from glass heating and cooling (like in pottery).

 

You can colour all the glass surface. Generally this operation is done with rolls (see the area for colored glass in the section machines comparisons) engraved or not, or with pistols.

You can also put a colored image on the glass (with screen printing or digital printing). For more information go to the corresponding area in machines comparisons.

 

Screen printing from Andy Warhol

 

 

 

 

Other more industrial exemple.

 

 

After this operation the glasses go inside a furnace to fix the color on or inside the glass depending the final using (advertising, architectural…).

 

 

Industrial glass manufacturing.

The different products are sent in a melting oven. The industrial process is called "float"

This process was design by a person called Pilkington. This invention allowed to decrease drastically the manufacturing cost and opened huge market for flat glass.

At the oven outlet the glass flows on a tin bath.

 

Float glass drawing

Float drawing

 

The glass goes inside rolls allowing to produce glass in the thickness required (3, 4 ,5 ,6 , 8 ,10  ,12 ,15 ,19 mm), is cut and sent to the processing companies.