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L’ancien dirigeant de la miroiterie Schultz président de la CPME 53



Raphaël Alexandre a été désigné président de la CPME 53, la confédération des petites et moyennes entreprises de la Mayenne, jeudi 9 janvier 2020. Ce n’est pas son premier mandat au sein de l’institution : il a déjà occupé les postes de vice-président à l’industrie et à l’artisanat.

Directeur de la miroiterie Schultz à Saint-Berthevin jusqu’en 2016, Raphaël Alexandre a créé en 2018 l’agence Cheval et Patrimoine spécialisée dans le tourisme équestre. « Nos adhérents se composent essentiellement d’artisans qui travaillent seuls, rappelle le nouveau président. Notre mission reste de les aider au quotidien. »


Acquisition of a mirror factory by Cevino glass in the Lyon region


The mirror of the North of France which has been operating since 2012 from the Dubrulle and Kap Glass mirrors has just bought the mirror of Ponchara, Tecni bombage from its manager Jean Mas. Tecni bombage is one of the major French players in the field of curved glass with around fifty employees and a turnover of around 8 million euros.

Cevino glass which bought in 2018 the mirror maker Nealtis operating in the Paris region now has 14 production sites in France

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.



Countersinks for flat glass


After drilling it may happen that the periphery of the hole there are some scratches or that this hole is intended to let a screw to fix the glazing and that it is desired to house the head of the screw inside the glass.

In this case we will mill the glass around the hole, either to remove the scratches (case glass for tempering) or to create a cavity to accommodate the screw head.

The diamond tool used is a countersink. It is a diamond cone, the diamond part making an angle of 45 ° with respect to the axis of the tool.

How to choose the right tool because there are several?

There are several  types, adjustable or not, continuous diamond crown or segmented diamond crown.

Adjustable or not.

In the case of adjustable countersinkss it is a truncated-shaped tool that is mounted directly on the body of the drill and that is blocked by a screw at the desired height. Each countersink of this type can only be used with one drill diameter.

This type of tool is used when all holes for a certain drilling diameter must be milled, the drilling and milling operation being done without changing tools on the drill. For this type of tool it is important to check with your supplier that the rotation speed of your drill is the same as for milling.

In the case of non-adjustable countersinks it is a diamond cone (or in some cases also a truncated cone). Choosing the right tool is based on the range of hole diameters for which you want to use it. Watering is done in this case as for a classic core drill, by the inside and outside of the diamond tool.

Diamond crown continues or not?

The parameter to take into account in this case is the depth of the milling. A continuous diamond countersink is capable of removing up to 2 mm of glass. A countersink  with a segmented crown can remove up to 5 mm of glass.

Possibility also in this case to have adjustable countersink or not.

More information on


Tools to drill flat glass