Stone newsletter. November 2015
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Stone, general.
The rock formation is an ongoing process that occurs throughout million years.
The appearance and natural stone properties are defined by how natural stone was formed: by rivers, by volcanoes, by the formation of massive ...
Each natural stone is unique in that no place in the world is going through the same geological processes, creating a great diversity in their composition.
This is why the same type of stone can present as many differences in appearance and properties
Commercially, natural stone is divided into several large groups: granite, marble, limestone, basalt and slate are the most important.
This commercial subdivision diverges from those reports in the scientific world where there are three main groups:
-The Magmatic rocks (lava, basalt)
-The Sedimentary rocks (sandstone, limestone, marble)
-The Metamorphic rocks (quartzite, slate)
Next fair of stone, Xiamen Stone Fair
The fair, mainly professional will be held from 6 to 9 March 2016 in Xiamen China uen exhibition area of about 180,000 square meters.
This is a very important fair with over 2,000 exhibitors of which about one third non-Chinese, with a strong Turkish presence, Italian and to a lesser extent Brazil.
Visitors are mainly Chinese in more than 80% (more than 140,000 visitors are expected in total). The majority of foreign visitors comes from Asia (5,000 European visitors are expected).
70% of exhibitors are producers or traders stones, 25% are producers of machinery or tools
Enamelled lava
The klinker, according NF / EN 121 AI is a material that is highly developed in recent years. It is used for the same reasons as the washing, that is to say for its excellent qualities of resistance demanding weather conditions. The thickness of sandstone plates is generally 8 mm, close to that of a tile. This facilitates the implementation of these plates; in addition, they are much lighter than the washed plates. Sandstone weighs 18kg / m² against approximately 50kg / m² for washing. An infinite number of sizes and shapes are possible, of 1192 x 1192 mm, to be cut to a minimum of 100 x 100 mm, thanks to the technique of the water jet. You can reach greater achievements by superimposing or juxtaposing multiple sclerosis.
Enameling of plates: enamels (of the same type as earthenware, it is mainly iron oxides and derivatives, ground) are applied on a lava surface or sandstone and baked between 850 ° for sandstone and 960 ° , 980 ° or 1000 ° for washing (according cloisonné or surface). The dish is cooked once with a layer called slip, filler over 1000 ° and a second time with a glaze that gives the background color (faience glazes around 1000 °). Several firings may be necessary to cook successively different enamels for illustrations and texts. If this is the silk screen technique is chosen, the plate will cook a third and final time (screen printing enamels) between 780 ° and 900 °.
The lava and enamels are both silicates. They bind to perfectly cooking and ensure a perfect adhesion of the enamel. However, the expansion coefficient of the enamel being greater than that of the stone, an enamel relative shrinkage phenomenon occurs on cooling and shows microcracks, quite normal. This is the so-called crazing can be highlighted for a decorative effect by applying a "juice" that enters the cracks.
Sandstone him so very similar to the lava, be glazed at high temperatures (over 850 °) for ten hours but will not experience this phenomenon of crazing. This is the main aesthetic difference when the background stone is not visible.
Assignment of right of exploitation of a sandstone quarry.
Operating rights Champenay sandstone quarry summers have given in to the company CAREER OF Champenay GRES,
New address of the operator
GRES OF CAREER Champenay EURL 1100 road HANTZ Champenay - BP 10 67420 PLAIN
tel: 
03 88 97 62 3203 88 97 62 32 03 88 97 62 32
fax: 03 88 47 24 01
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The colors of the tombstones in the Indre, France.
In Indre-et-Loire color tombstones is mostly tinted black and gray. Rémi Legrand was born 32 years ago, the same year, Joel, his father, redeemed marblework Ligueil. Suffice to say that the childhood of the current head of the funeral of Saint-Cyr-sur-Loire was rocked by the whole world that is so particular that of the monument .. "used to be erecting mausoleums, chapels, because the families lived in the same place. It truly was a family tomb; as a way to show that was among the villagers. "
Today the monuments are increasingly bare. "There are still a few years, the" five parts prie-dieu, ogee stele "was the rule (note: a base to kneel but which today is most often used as a gardener, and a rounded shape is reminiscent of a wave). Everyone did that. Now we start on more modern architectures with predominance of granite.
At Saint-Cyr-sur-Loire, it has never sold as many black tombstones. The gray granite Tarn however, continues to be asked because it is more economical, but Joel Legrand notes and notes "between Britain and the Tarn, it has lost 3,500 Granit the benefit of imports. "
We opposed it continues to work Granit small craftsmen who perform on demand ". The leader says that no more marble today manufactures its own monuments. "We, it has the distinction of not selling catalog. It develops a model with the client, it is designed with 3D software and ensures customization. We are probably still a few to do it in Indre-et-Loire, but it is rare, "says site manager of Saint-Cyr.
His father says that the craft of stonemason strict sense no longer exists, "they have all had to add to their business that of funeral directors to adapt to a profession in which some observed concentration phenomena. "
Discover or become more professional in the dry stone
The CFPPA Carmejane offers training in the restoration of Mediterranean rural heritage, authorized by the Ministry of agriculture, food and forest.
"Technical Agent heritage site"
the Cordeliers Convent of January 18, 2016 to June 24, 2016.
The training alternates theoretical courses, restoration projects and internships. The trainers are professionals, murailler, masons, landscape gardener. All projects take place in a real situation, in partnership with municipalities.
This training allows to acquire traditional skills in landscaping: dry stone wall construction and calade, planting.
You also will practice specific techniques in the restoration of old buildings and small heritage: lime plaster, stone wall masonry,
with intensive practice of dry stone with respect for traditional craftsmanship.
Public: adult job seekers, employees DIF, CIF. Degree or experience
in masonry or recommended landscaping.
The training is funded by the Provence Alpes Côte d'Azur.
Applicants may receive compensation under certain conditions.
Open recruitment for the 2016 session
Auction, stone processing machines.
Following the liquidation of marble Del Bano, all workshops machinery (thirty machines) and materials stock will be auctioned on December 2 from 14 hours on the site of former Ets DEL BANO, road ALET in LIMOUX (11300). France
Octopod Thibaut
Thibaut has a suction system for CNC machines without cables or vacuum pump.
Each suction cup is independent and is equipped with a battery. Digital control continuously controls the vacuum generated by each suction cup .
