How is it produced?

Silicium oxide, alumina, soda and several metal oxides like titanium oxide, iron oxide and cobalt oxide, mixed with compounds which decrease the melting point of the final glass, are melted at about 1200°C in a rotating furnace. After several hours the melt is released, cooled and broken in order to obtain flakes.

These flakes are put on a ball mill together with some clays, colour pigments, salts and water.
After this milling process a slurry is made. Before usage the slurry is measured, sieved and adjusted to meet the specifications for purpose in production.

After applying enamel to the base surface, vitrification firing is carried out at about 750 – 950°C; depends on the base material and specifications of the porcelain enamel. Porcelain enamel is an inorganic and vitreous coating used on metals for protective, functional and decorative purposes.

This procedure triggers between the two surfaces chemical and physical reactions which create a new material combining the properties of glass (hygiene and hardness) and those of the base metal (resistance, formability and lightness). (See cross cut picture)

Rarely has the joining of two such different materials given such brilliant and versatile results, both in terms of aesthetics and performance. For this reason porcelain enamel has always enjoyed increasing growth, parallel to the search for new areas of use and formulae which comply with increasingly strict requirements.

Precursors

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Cooling of the released melt

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Cooling of the released melt

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Broken and cooled flakes

Ball mill for production of enamel slurry

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Sieving of released enamel slurry

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Spraying of enamel slurry

cut through

Cross cut of enamelled steel part (bottom=steel)