A method for hardening glass surfaces award in Geneva

No more broken smartphone screens or scratched watch glasses. The 44th Exhibition of Inventions of Geneva awarded its Grand Prize to an exhibitor from Hong Kong Baptist University for a new curing process glass surfaces.

(Ats) The method involves applying high temperature sapphire film, one of the toughest materials in the world of glass or quartz, said Friday night the show organizers. This very thin layer is sufficient to ensure protection almost equal to that of a block of iron ore.

Transparency is not impaired. The optical transmission of the film is indeed very close to that of glass, between 89 and 92%. The method should interest many areas. It could be applied to all surfaces in flat or curved glass.

Professor Cheah Kok Wai, who won this year's Grand Prix, the rest working in the company Cathay Photonics, a company active in the optics.

The International Exhibition was also rewarded 45 other inventions among the thousands of new products presented.

The Miroiterie Landaise avoids liquidation, continuation plan approved


A long series that ends positively.



The Commercial Court of Mont de Marsan has validated Friday, March 25 the continuation plan presented by the patron of the Landes Mirrors.

A dozen mainly Landes investors commit to provide € 400,000 of new money to revive the company. The 117 employees are relieved.

117 employees of the Landes Mirrors retain their workstation.


Reboot float Salaise sur Sanne

After 110 days of work, the furnace of the plant Eurofloat Salaise-sur-Sanne (Isère) was inaugurated today by Saint-Gobain Flat Glass and Riou.
€ 26 million were invested for its complete renovation and modernization of the float line which manufactures flat glass for residential and commercial buildings. Prepared for almost two years, this operation was carried out in record time between stopping the output end of January and the first glass poured on 20 May.

Emmanuel ABT, CEO of Eurofloat
This renovation allows to significantly improve technical and environmental performance of the float line with productivity increases of about 10%, from 580 to 650 tons of glass produced per day.
His new oven benefits from advanced technologies to reduce energy consumption by nearly 25% over the old facility and, therefore, CO2 emissions in the atmosphere.
Restarting the float line ensures the sustainability of the French industrial site, the life of the new furnace is 20 years. It is also a guarantee for all local and regional subcontractors, mostly SMEs, working for Eurofloat.

From left to right: Nicolas Riou, CEO of Glass Riou, Pierre Riou, president and founder of Riou Glass Group, Patrick Dupin, director pole Glazing Saint-Gobain and Jerome Lionet, director of Glass Industry.
Joint production company equally owned by Saint-Gobain and Riou Flat Glass subsidiary of Riou Glass Group, Eurofloat produces 22 million square meters of flat glass per year on its float line, 10 million of which are then transformed into glass thin film on the magnetron line and 6 million in laminated glass on its assembly line. Production of the plant supplies the French market and the Benelux.

"This major investment confirms the support that Saint-Gobain wants to bring to the glazing and building market in France. We managed to build with our employees and local communities, modern production facilities, and sober economic energy, consistent with our strategy of sustainable housing, "says Patrick Dupin, director of Saint-Gobain glass pole.
"I am very pleased today to inaugurate this new oven and stand as such to warmly thank the entire team of Eurofloat and subcontractors who worked for his production launched as quickly. Eurofloat is a very French tech industry. A flagship demonstrates the European and world market our know-how of glass products with high added values. Modernizing Eurofloat we invest for the future and the preservation of our jobs in the region, "says Pierre Riou, president and founder of Riou Glass group.

Discovery of the oldest glass furnaces Israel near Mount Carmel


glassmaking furnaces dating back to the late Roman era were discovered at the foot of Mount Carmel, between junctions Ha-Amakim and Yagur, announced Monday the Israeli Antiquities Authority (IAA). This archaeological discovery is further evidence of the place occupied by the Israeli glass industry on the international stage.

Israel, a major glass production center

Furnaces glass splinters, discovered during excavations carried out in the framework of a railway project underway in the Jezreel Valley, prove that Israel was indeed a leading glass production centers of the ancient world .


"This is a very important discovery with implications for the history of the glass industry both in Israel and in the entire ancient world," says Yael Gorin-Rosen, chief curator of the department glassware in the AIA. He added: "We know from historical sources dating back to the Roman era that the Acre Valley was famous for the excellent quality of its sand, particularly suitable for the manufacture of glass. Chemical analyzes of glass utensils from this period discovered in European sites and wrecks of sunken ships in the Mediterranean region have proved that the glass is rooted in our region. Now, furnaces have been discovered, for the first time, where the raw material used to manufacture the glassware was produced. "


The extraordinary results of these almost accidental excavations have attracted glass experts worldwide. "This sensational discovery is of great interest for the understanding of all the glass trade system in antiquity. Here we have evidence that Israel was a production center of international importance; his drink was widely distributed in Europe and all the Mediterranean countries, "says Professor Ian Freestone of the University College London, an expert in the identification of the chemical composition of the glass.

The site was located by Abdel Salam Al-Sa'id, an inspector of AIA who oversaw the construction of the new railway line linking Haifa to the east. The archaeologist, whose task is to ensure that the work does not affect sites that may have historical significance, discovered pieces of raw glass, antique stalls and a layer of ash in a trench. "We also found pieces of glazed bricks from the walls and ceiling of the oven," says the director of excavations.

Industrial production for a growing market


Furnaces included two compartments: a combustion chamber where burning kindling to obtain a very high temperature, and a melting chamber in which the raw materials (the pure sand and salt) were inserted and then fused to a temperature of about 1200 Co. The glass was then heated for one to two weeks, until huge pieces of raw glass are formed. Some weighed over 10 tons. At the end of the production process, the ovens were cooled and the glass pieces were broken into smaller pieces and sold to workshops where they were re-melted to produce glassware.

The use of glass has largely developed in early Roman times, because of its characteristics very popular: its transparency, beauty, delicacy and manufactured utensils and speed production blow. Become a necessity in every home of the Roman Empire, glass was produced in industrial quantities in specialized centers. The site discovered in the Zvoulon Valley is an excellent example of such glass manufacturing centers.

Remember also that the edict of Maximum, issued 301 of the vulgar era by the Roman emperor Diocletian, mentions two types of glass: the first known under the name Judea glass (that is to say, the Land of Israel) and the second glass of Alexandria (Egypt). The glass Judea was light green and cheaper than Egyptian glass. This discovery now allows to locate one of the centers where this had occurred prized commodity in the Roman Empire.

The ovens will be transferred to the regional school "Carmel Zvoulon" and exposed to the public in a few months.



Histoire de la pierre, marbres et granits :


Les origines


A l’origine étaient appelées marbres toutes les pierres que l’on pouvait polir sans aucune référence à leur composition. On a donc appelé marbres, des roches qui étaient en fait des granits, des basaltes, des calcaires… qui sont considérés comme des marbres anciens par opposition aux marbres modernes qui dérivent tous du calcaire.

Le mot marbre est dérivé du terme Grec Marmaros qui signifie "pierre brillante"

Le terme granit apparait lui beaucoup plus tard au  17 ème siècle et dérive du terme Italien "granito" qui signifie grain. D’ailleurs en Anglais on parle de "granite".

Les marbres se sont formés au fond des océans par dépôt de calcaires pendant une période située entre -380 et -330 millions d’années.

Les matières en suspension dans l'eau se sont peu à peu déposées en lits les unes au-dessus des autres et ont constitué des formations géologiques appelées bancs.

L'action de différents éléments naturels (mouvements des couches, pression, action du soleil, de l'oxygène..) ont changés peu à peu les caractéristiques originelles et la couleur donnant à la pierre son aspect définitif.

Les mouvements des couches plus profondes vont soulever et faire se déplacer ces couches de marbres que l’on retrouvera le plus souvent dans des collines en faible altitude au pied des principaux massifs montagneux.

L’action de la lumière et de la chaleur va faire cristalliser ces roches et lui donner son aspect actuel.

Ces marbres, que l’on appelle marbres primaires ne contiennent jamais de fossiles car ils se sont formés à une époque où la vie n’existait pas encore sur la terre.