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Water and Heat Resistance of Porcelains vs. that of ceramics
Both ceramic and porcelain have very good resistance to heat and are sometimes used on countertops. The experts in Arta Ceram, the greatest Iranian manufacture of luxury porcelain and ceramic tiles , deal with this issue.
Porcelain Tile
Porcelain tile is denser, heavier, and more impervious to water, and thus is a better choice than ceramic tile for outdoor locations, although outdoor use is recommended only in mild climates. Porcelain tile has excellent resistance to heat, making it a good choice for countertop surfaces.
Ceramic Tile
Ceramic tile is somewhat more susceptible to moisture infiltration, though the differences are minimal if the tile is glazed. Ceramic tile has excellent heat resistance, making it a good choice for countertops.
Best for Water and Heat Resistance: Porcelain Tile
Porcelain has slightly better water resistance, making it possible to use it in outdoor locations in regions with mild climates. Ceramic tile is generally not recommended for outdoor locations in any environment.