1.1 本试验方法涵盖了测量以下类别瓷砖的角部、对角线和边缘翘曲的程序: 1.1.1 方形瓷砖， 2乘2英寸。（51乘51 mm）或更大，标称平坦，总厚度均匀，表面光滑，有以下类型之一:无釉、亮釉、哑光釉或精细结晶釉。 1.1.2 长方形瓷砖， 面部尺寸不得小于2英寸。（51 mm），平整，总厚度均匀，表面光滑: 无釉、亮釉、哑光釉或精细结晶釉。 1.1.3 方形和长方形瓷砖， 面部尺寸不得小于2英寸。（51 mm），但表面不规则，如浮雕、倾斜、凹凸、波浪状、粗结晶或线切割纹理。 1.1.4 非直线瓷砖， 大于4 在里面 2. (26 厘米 2. )是指平整、体厚均匀、表面光滑或不规则的，如六角形、菱形、西班牙式等。 1.1.5 修剪瓷砖 满足中的描述之一 1.1.1 – 1.1.4 除了瓷砖表面只有一部分是平的。（如有可能，表面装饰瓷砖应视为平瓷砖。） 1.1.6 方形或长方形瓷砖 面部面积小于4英寸。 2. （26厘米 2. )以及至少两个等于或大于1.0英寸的直边。（25 mm）长。（模块化1×1英寸瓷砖不在本试验方法的范围内。） 1.2 本试验方法不适用于具有不平坦浮雕表面或具有可变主体厚度和不规则面的组合的瓷砖。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 本试验方法提供了一种确定大量瓷砖是否符合规范中可能出现的翘曲要求的方法，以确保瓷砖安装符合要求。根据本试验方法，翘曲按被测边缘或对角线长度的百分比计算。可以意识到，基于瓷砖整体边缘长度或整体对角线长度的百分比值将略低于基于参考点之间距离的百分比值。 然而，对于任何特定尺寸的瓷砖，总长度与参考点之间距离的比率实际上是恒定的，因此，百分比值将具有可比性，并同样指示翘曲。

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. 1.1.2 Oblong Tile, no facial dimension smaller than 2 in. (51 mm), that are flat, of uniform overall thickness, and have a smooth face of one of the types: unglazed, bright glazed, matte glazed, or finely crystalline glazed. 1.1.3 Square and Oblong Tile, no facial dimension smaller than 2 in. (51 mm), that are flat, but have an irregular face such as embossed, sloped, bumpy, wavy, coarsely crystalline, or wire-cut textured. 1.1.4 Nonrectilinear Tile, larger than 4 in. 2 (26 cm 2 ), that are flat and of uniform body thickness with smooth or irregular face, such as hexagonal, diamond, Spanish type, and so forth. 1.1.5 Trim Tile meeting one of the descriptions in 1.1.1 – 1.1.4 except that only a part of the tile surface is flat. (Surface trim tile should be treated as flat tile whenever possible.) 1.1.6 Square or Oblong Tile with facial area less than 4 in. 2 (26 cm 2 ) and at least two straight sides equal to or greater than 1.0 in. (25 mm) long. (Modular 1- by 1-in. tile are not in the scope of this test method.) 1.2 This test method is not applicable to tile having embossed surfaces that are not flat, or that have a combination of variable body thickness and an irregular face. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This test method provides a means for determining whether or not a lot of ceramic tile meets the warpage requirements that may appear in specifications to assure satisfactory tile installations. In accordance with this test method, warpage is calculated as a percentage of the length of the edge or diagonal being tested. It is realized that the percentage values based on the overall edge length, or on the overall diagonal length of a tile will be slightly lower than those based on the distance between reference points. However, the ratio of the overall lengths to the distance between reference points will be practically constant for any particular size of tile and, therefore, the percentage values will be comparable and equally indicative of warpage.