Glossary of Terms


A step during the manufacture of ceramic tile using a kiln or furnace to develop desired properties through controlled heat treatment.

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Terra Cotta Floor Tile
... porous tiles absorb moisture more readily and therefore stain more easily. Machine made unglazed quarry tile are manufactured by extrusion; forcing the clay through a die. Before curing and firing, the clay sometimes goes through a vacuum chamber to draw out any air bubbles. It can be difficult to tell some machine made tiles from hand-molded ones. The tip-off is a precisely scored back,...