nonvitreous tile

nonvitreous tile

Ceramic tile having a degree of vitrification evidenced by a water absorption greater than 3%; an exception is nonvitreous floor and wall tile, which has a water absorption above 7% but less than 18%.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Tile is also classified according to its resistance to water absorption (Nonvitreous tile 7.0 percent, impervious tile 0.5 percent or less, semivitreous tiles are classified between nonvitreous and impervious tile)." (2) But "European manufacturers classify tile according to its production method (either the dust-press or extrusion method), degree of water absorption, finish and whether it is glazed or unglazed." (2) Especially nonvitreous tiles are used indoors as wall tiles and semivitreous tiles are only used indoors, on walls and floors.