Porcelain tile are the strongest of any manufactured flooring.
They can either be unglazed or glazed.
The water absorption rate on porcelain tile makes it suitable for interior and exterior applications in all climates.
Porcelain tile, differs from ceramic tile in its manufacture, absorption (usually have a much lower water absorption rate: less than 0.5%) and breaking strength.
Large scale production of porcelain tile is undertaken in many countries, with the major producers being China, Italy, Spain and Brazil.