Porcelain is a classification of ceramic tile. True porcelain is composed of porcelain grade clays fired to extremely high temperatures (2100-2500 deg F). This process creates a very hard, dense product with a very low water absorption rate (< 0.5%). See the American National Standards Specifications (ANSI) A137.1 and the CTDA porcelain certification program for more information on porcelain tile requirements.

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