1.1 ,This test method covers procedures for measuring the corner, diagonal, and edge warpages of the following categories of ceramic tile:
1.1.1 ,Square Tile, 2 by 2 in. (51 by 51 ,mm) or larger, that are nominally flat, of uniform overall thickness, and have a smooth face of one of the types: unglazed, bright glazed, matte glazed, or finely crystalline glazed.