1.1 本试验方法涵盖了一个程序，用于确定弹性地板覆盖物在指定时间段内暴露于高温时的耐变色性。 1.2 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。 1.3 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、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 弹性地板覆盖物是通过在各种制造和装饰过程中，在高温或压力下，或两者兼而有之的情况下，将聚合物材料熔融而成。聚合物材料可与增塑剂、稳定剂、填料和其他成分复合，以获得加工性能和产品性能特征。根据所需的性能特征和加工方法，化合物的配方可以有很大的变化。参见练习 D794 了解更多重要信息和使用信息。 3.1.1 耐高温变色的热稳定性是加工和功能使用的基本要求。 3.1.2 本试验方法提供了一种测量地板产品在高温下一段时间内颜色变化量的方法（地板产品的功能性使用）。 3.2 本试验方法并非用于预测加工（制造）过程中发生的颜色变化量。 3.3 本试验方法规定，样品在158°F±2°F（70°C±1°C）下放置7天，色差用分光光度计测量，并用Δ表示 E *单位。 注1: 本试验方法用于测试弹性地板规范中参考的热稳定性性能。

1.1 This test method covers a procedure for determining the resistance of resilient floor covering to color change from exposure to elevated temperature over a specified period of time. 1.2 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. 1.3 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. 1.4 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 Resilient floor covering is made by fusing polymer materials under heat or pressure, or both, in various manufacturing and decorating processes. The polymer material may be compounded with plasticizers, stabilizers, fillers, and other ingredients for processability and product performance characteristics. The formulation of the compound can be varied considerably depending on the desired performance characteristics and methods of processing. See Practice D794 for additional significance and use information. 3.1.1 Heat stability, which is resistance to discoloration from heat, is a basic requirement for processing and functional use. 3.1.2 This test method provides a means of measuring the amount of color change in flooring products when subjected to elevated temperatures over a period of time (functional use of the flooring product). 3.2 This test method is not intended to be a means of predicting the amount of color change that occurs during processing (manufacture). 3.3 This test method specifies that a sample is subjected to 158°F ± 2°F (70°C ± 1°C) for 7 days, and the color difference is measured by a spectrophotometer and expressed as Δ E * units. Note 1: It is the intent that this test method be used for testing heat stability performance properties to be referenced in resilient flooring specifications.