1.1 本试验方法涵盖了当glost烧制后的残余应力可能导致开裂倾向时，烧制、上釉、陶瓷白色器皿的抗裂性测定，这些应力是由水分膨胀以外的因素引起的。 1.2 本试验的目的不是诱导水分膨胀，如果待评估的材料可能表现出水分膨胀，则应牢记这一事实。 注1: 试验方法 C424 涵盖了一种测定由水分膨胀引起的抗裂性的方法。 它的使用通常仅限于测试非透明和半透明的陶瓷白色器皿，因为这些产品可能会发生这种膨胀。对于水分膨胀可忽略不计的白色器皿（如玻璃质和不透水的器皿），本文所述的热冲击法通常是首选。 1.3 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体的危险声明，请参阅 警告 在里面 6.3 . 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 3.1 除非釉料的膨胀和坯体之间有适当的匹配，否则所有上釉的白色瓷器都可能含有将釉料粘合到坯体上的烧制产生的残余应力。此外，白色家电在使用过程中越来越受到热应力的影响。因此，釉面白色器皿的一个重要使用标准是对反复突然的热变化具有足够的抵抗力。在大多数情况下，抗热震性不足的结果是釉料中出现裂纹图案。 通过倾斜照明和使用合适的油墨或染料进行检查，可以看到这种裂纹图案。 3.2 本试验方法适用于因水分膨胀而产生可忽略不计的裂纹的玻璃白色器皿。对于非玻璃体和半玻璃体，请参考试验方法 C424 .

1.1 This test method covers the determination of the resistance to crazing of fired, glazed, ceramic whitewares when stresses residual after glost firing may cause a tendency to craze, such stresses being induced by factors other than moisture expansion. 1.2 This test is not intended to induce moisture expansion, which fact should be kept in mind if the materials to be evaluated may exhibit moisture expansion. Note 1: Test Method C424 covers a method for determining resistance to crazing induced by moisture expansion. Its use is generally confined to testing nonvitreous and semivitreous ceramic whitewares because these products may be subject to such expansion. For whitewares with negligible moisture expansion (such as vitreous and impervious ware), the thermal shock method described herein is generally to be preferred. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Warning in 6.3 . 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 Unless there is a proper match between the expansions of the glaze and the body, all glazed whitewares may contain residual stresses from the firing that bonded the glaze to the body. In addition, whitewares are increasingly subjected to thermal stresses in service. Hence, an important use criterion for a glazed whiteware is adequate resistance to repeated abrupt thermal changes. In most cases, the result of inadequate resistance to thermal shock is the appearance of a craze pattern in the glaze. This craze pattern is visible by inspection with oblique lighting and application of a suitable ink or dye. 3.2 This test method is applicable to vitreous whitewares that have negligible crazing as a result of moisture expansion. For nonvitreous and semivitreous bodies, refer to Test Method C424 .