1.1 本规程涵盖了测量轮胎胎面花纹的凹槽或空隙面积的技术。空隙面积是在负载台板上相对于重磅纸静态加载的轮胎胎面的着墨压痕上测量的。 1.2 本程序旨在作为测量轮胎印迹中凹槽或胎面花纹空隙区域的参考实践。这种技术可以在没有特殊设备的情况下被任何实验室使用，尽管通常也会采用更复杂的程序，例如光学或摄像机过程。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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）。本标准的使用者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。 1.5 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====== 5.1 轮胎的胎面，即与路面接触的环形带，通常包含由凹槽或空隙定义的几何胎面花纹元素。这些用于赋予轮胎适当的牵引性能，主要是在潮湿或积雪的道路上。 5.2 轮胎胎面花纹的一个特征特征是凹槽面积的百分比或“分数”，这对牵引力和轮胎磨损行为都很重要。凹槽- 面积分数是相对于总接触面积或总接触面积来计算的。

1.1 This practice covers a technique for measuring the groove or void area of a tire tread pattern. The void area is measured on the inked impression of a tire tread statically loaded against heavyweight paper on a load platen. 1.2 This procedure is intended to serve as a reference practice for measuring groove or tread pattern void areas in a tire-footprint impression. This technique is usable by any laboratory without special equipment although more sophisticated procedures are also commonly employed, such as optical or video camera processes. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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. 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 ====== 5.1 The tread of a tire, the annular band that contacts the pavement, normally contains geometric tread pattern elements that are defined by grooves or voids. These are employed to confer appropriate traction properties to the tire, mainly on wet or snow-covered roads. 5.2 One characteristic feature of tire tread patterns that is important for both traction and tire wear behavior is the percent or “fractional” groove area. The groove-area fraction is calculated with respect to the total or gross contact area.