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The Manufacturing Process of Refractory Ceramics Gres

Vulcano Gres refractory ceramic is the result of a meticulous process that combines artisan expertise with technological innovation. This ceramic is known for its ability to retain heat and save energy, making it an ideal choice for oven and grill applications.

Below, we will guide you through the key stages of its manufacture.
1. Mixture of Essential Raw Materials:
At the heart of the manufacture of Vulcano Gres ceramics is the refractory mix of high quality raw materials. This mix includes rolled sands, consisting of quartz, feldspar and mica. These raw materials are carefully selected for their refractory properties, which allow them to withstand high temperatures without deteriorating.

2. Preparation of the stoneware material:
The stoneware material is grouted to give it the required consistency and shape. It is then cut into pieces according to the design of the piece to be created. This initial stage is crucial to ensure the uniformity and quality of the final product.

3. Pressing and blowing:
Once the stoneware material has been obtained in the desired shape, pressing and blowing is carried out. During this process, pressure is applied to compact the material and any burrs resulting from pressing are removed. In addition, the surfaces are smoothed to cover any imperfections and prepared for the subsequent stages.

4. Drying and Preparation for Firing:
The pressed pieces are allowed to dry completely to remove any remaining moisture. This process is essential to avoid warping and cracking during firing. They are also inspected to ensure that they are ready for the next stage.

5. First firing (biscuit firing):
The dry pieces are subjected to a first firing at a temperature of 850°C. This step, known as 'biscuit firing', strengthens the pieces and makes them more resistant. The pieces acquire a grey texture at this point.

6. Second firing (Vitrification):
After bisque firing, the pieces are covered with ceramic glaze. The glaze not only improves the appearance but also provides an additional protective layer. The pieces are fired again, this time at a temperature of 1250°C, which causes the glaze to vitrify and changes the colour of the pieces according to their composition. The result is a durable, resistant Vulcano Gres ceramic with a wide range of colours available.

This is the fascinating manufacturing process behind Vulcano Gres refractory ceramics, a testament to the craftsmanship and precision that combine to create high quality products designed to withstand the most extreme conditions.

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