1.1 本试验方法包括测定高压釜处理后再水化引起的白色器皿体的伸长率。 1.2 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。 1.3 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====== 2.1 本试验方法提供了确定烧制的白色陶瓷材料物理尺寸增加的方法，这些材料是在高压和高温下水和水蒸气反应产生的。这些反应可以在正常大气压和温度下及时发生；水的物理尺寸变化会影响装置的完整性和稳定性。对于釉面瓷器，水分膨胀会导致开裂。

1.1 This test method covers the determination of the elongation of whiteware bodies caused by rehydration as a result of autoclave treatment. 1.2 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. 1.3 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 ====== 2.1 This test method provides means to determine increases in physical dimension of fired whiteware materials which develop from the reaction of water and water vapor at elevated pressures and temperatures. These reactions can occur in time at normal atmospheric pressures and temperatures; changes in physical dimensions from water can influence the integrity and stability of an installation. In the case of glazed ware, moisture expansion can lead to crazing.