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Ceramic tiles are thin slabs generally used to cover walls and floors.

They are made from clay and other inorganic raw materials that are ground and/or mixed and then moulded before drying and firing at sufficiently high temperatures to acquire the necessary stable properties.

Ceramic tiles may be unglazed (UGL) or glazed (GL). Unglazed tiles are fired only once, whilst glazed tiles receive a vitrifiable coating between the first and second firing (in the case of double fired tiles) or before the sole firing (in the case of single fired tiles).

The following names and descriptions are based on objective criteria relating to the tiles’ use, technical properties, customs classifications etc., as well as the most commonly used commercial terminology. However, there are no commonly accepted names or definitions for the various types of ceramic tiles, and it may therefore be necessary to provide additional comments, especially in the cases mentioned specifically.

The following pages provide descriptions of the various types of ceramic tiles, including details of their characteristics, most common uses, production, appearance and classification in accordance with standards etc.
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