1.1 本规范涵盖了评价涂层抗涂鸦性的基本方法，以及在室外或实验室加速暴露后（涂鸦应用之前或之后）使用本规范评价涂层的抗涂鸦性。抗涂鸦性基于一组定义的清洁剂如何去除一组定义的标记。 1.2 本规范还定义了评估重新标记和随后重新清洁后涂鸦清除情况的程序（可选）。它没有解决涂层不再耐涂鸦后的可重涂性。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 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 建筑物和构筑物上的涂鸦是一个持续且日益严重的问题。已经生产了许多涂层，其旨在抵抗涂鸦标记的施加，或提供可以容易地去除这种标记的表面。本实践中描述的程序提供了一组标准条件，可用于评估表面的抗涂鸦性。 5.2 根据本惯例确定的抗涂鸦性适用于光滑表面。施加到粗糙或纹理表面的相同涂层的抗涂鸦性可能较低。 5.3 在根据本实践进行的标记之前或之后，在自然或实验室加速风化后测定的涂层的抗涂鸦性被认为比未经风化测定的相同涂层的抗涂鸦性具有更大的权重。自然风化后测定的涂层抗涂鸦性应被认为比实验室加速风化后测定的抗涂鸦性更重要。

1.1 This practice covers a basic method for evaluating graffiti resistance of coatings, and use of this practice to evaluate graffiti resistance of coatings after outdoor or laboratory accelerated exposure (either prior to or after graffiti is applied). Graffiti resistance is based on how a defined set of markings is removed by a defined set of cleaning agents. 1.2 This practice also defines procedures (optional) to evaluate graffiti removal after re-marking with subsequent re-cleaning. It does not address recoatability after a coating is no longer graffiti resistant. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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 Graffiti on building and structures is an ongoing and increasing problem. A number of coatings have been produced that are intended to be resistant to the application of a graffiti marking, or to provide a surface from which such markings can be easily removed. The procedures described in this practice provide a standard set of conditions that can be used to evaluate the graffiti resistance of a surface. 5.2 Graffiti resistance determined according to this practice is applicable to smooth surfaces. Graffiti resistance of the same coatings applied to a rough or textured surface may be lower. 5.3 Graffiti resistance of coatings determined after natural or laboratory accelerated weathering, either before or after marking, conducted according to this practice, is considered as having more weight than graffiti resistance of the same coating determined without weathering. Graffiti resistance of coatings determined after natural weathering should be considered as having more weight than graffiti resistance determined after laboratory accelerated weathering.