Porcelain tiles are a type of ceramic tile. They have an extremely low absorbent rate and are very durable. When the porcelain tile is first made it is not absorbent but when the tiles are polished to achieve the final finish this process makes them porous. Meaning that the porcelain tiles need to be treated and if they were a natural stone and sealed. Light coloured porcelain can also trap dirt and requires regular maintenance.Modern porcelain tiles are now of such a high standard that they can often be mistaken for marble, limestone and other natural stone. You can now by porcelain tiles that have a thin layer of natural stone adhered to it.