The short answer- yes. There is something close to a world of difference going by the stats listed by
HomeThangs.com . Porcelain is a term that is used loosely to describe varying qualities of tile to scale up the price, but the formal definition is light-colored tile made from clay with meager iron content.
However, color alone is not a solid indicator of true porcelain as colored glazes can tint most tiles a lighter color effectively. True, quality porcelain has a consistent color throughout unglazed, and a thicker density. Ceramic tile density can come close to the density of porcelain through vitrification, the process by which ceramic tile is heated at high temperatures for a long period of time, with increases durability. A test of certified porcelain then comes down to a water penetration test where tile is soaked in water and then analyzed for the amount of absorption into the tile. A water penetration of 5% or less is considered porcelain quality.
Ceramic tile and porcelain tile can be further compared by hardness factor on the Mohs scale and durability PEI rating. Mohs is generally tested by how easily the surface minerals can be scratched or violated and PEI covers general durability variables. Lastly, there is the Coefficient of Friction, which measures how much slip a tile surface has when wet- the higher the number, the less slip texture there is.
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