Porcelain tiles are covered under this Environmental Product Declaration. Glazed porcelain tiles are manufactured in INONU and Bilecik Plants. Full Body Porcelain tiles are manufactured in Bilecik Plant. Porcelain tiles are primarily made of naturally occurring materials such as clay and pegmatite, but they may also include other raw materials such as silica sand, frit, zircon, zinc and calcite. The compositions of both porcelain tiles are given in the EPD.