1.1 本规程涵盖了一种程序和设备，用于通过将路面标线材料涂覆到合适的基材上，然后立即涂覆由反光光学元件或其他功能性颗粒（例如适用于实验室测试或显示的防滑颗粒）组成的颗粒，制备具有代表性的实验室路面标线样品。适用于本实践的路面标线材料示例包括水性交通涂料、溶剂性交通涂料和多组分路面标线，如环氧树脂、改性环氧树脂、聚脲、甲基丙烯酸甲酯和热塑性路面标线。凝胶时间极快的多组分材料可能不适合这种做法，因为材料的凝胶速度太快，无法将液滴正确嵌入颗粒中。 1.2 成品样品将包括在规定的膜厚下以液体状态应用于样品基材的路面标线材料，并滴下- 以规定的滴速和嵌入水平在路面标线材料表面施加颗粒，然后适当固化。落在颗粒上的颗粒可能包括反光光学元件，如玻璃珠或复合光学元件，或非反光颗粒，如防滑颗粒，或其中几个项目的组合。 1.3 除非实践中另有说明，否则以英寸-磅单位表示的数值应视为标准。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。 1.4 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。 1.5 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====== 5.1 本规程中描述的方法提供了一种在实验室快速生成路面标线样本的程序，适用于测试应用的路面标线特性。 5.2 本规程旨在提供统一的实验室路面标线样本，以减少与现场获取路面标线样本相关的可变性。 5.3 本规程特别适用于直接比较受材料、膜厚和跌落变化影响的应用路面标线特性- 用于质量控制或开发目的的颗粒施用率。 5.4 本规程可用于评估实验室中配制和生产的路面标线材料，以及实验室中专门制备和制备的滴涂颗粒。它还可以用于测试已经制造的材料，或者作为在制品存储，或者放置在其最终包装中。在成品状态下测试制造材料时，获取路面标线材料的代表性样本和颗粒上的水滴以供使用，这一点极为重要，以便从对这些材料制成的路面标线样本进行的任何测试中得出正确的结论。为了对完工状态良好的热塑性路面标线进行适当取样，建议遵循惯例 D7307 和 D7308 . 为了对单组分和多组分材料的液体路面标线进行适当取样，建议遵循惯例 D8008 .

1.1 This practice covers a procedure and apparatus for producing a representative laboratory pavement marking sample by applying a pavement marking material onto a suitable substrate, followed immediately with an application of drop-on particles consisting of retroreflective optics or other functional particles such as skid resistance particles suitable for laboratory testing or display. Examples of pavement marking materials appropriate for this practice would include waterborne traffic paint, solvent borne traffic paint, and plural component pavement markings such as epoxy, modified epoxy, polyurea, methyl methacrylate, and thermoplastic pavement markings. Plural component materials with extremely fast gel times might not be appropriate for this practice because the material gels too quickly to allow proper embedment of the drop-on particles. 1.2 The finished sample will consist of a pavement marking material applied in a liquid state to a sample substrate at the prescribed film thickness, with drop-on particles applied at the prescribed drop rate and embedment level on the surface of the pavement marking material, and then properly cured. The drop-on particles may consist of retroreflective optics such as glass beads or composite optics, or non-retroreflective particles such as skid resistant particles, or several of these items in combination. 1.3 The values stated in inch-pound units are to be regarded as the standard except where noted in the practice. 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. 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 method described in this practice provides a procedure to rapidly generate pavement marking samples in the laboratory, suitable for the testing of applied pavement marking properties. 5.2 This practice is intended to provide uniform laboratory pavement marking samples that reduce the variability associated with obtaining pavement marking samples in the field. 5.3 This practice is particularly useful for directly comparing applied pavement marking properties as impacted by variations in materials, film thickness, and drop-on particle application rates for quality control or development purposes. 5.4 This practice can be used in evaluating pavement marking materials formulated and produced in the laboratory and for drop-on particles specifically made and prepared in the laboratory. It can also be used for testing materials that are already manufactured and either stored as work-in-process or placed in its final packaging. When testing manufactured materials in the finished goods state, it is extremely important that a representative sample of the pavement marking material and the drop-on particles are obtained for use, in order to draw the proper conclusions from any testing done on pavement marking samples made from these materials. For proper sampling of thermoplastic pavement markings in a finished good state, it is recommended to follow Practices D7307 and D7308 . For proper sampling of liquid pavement marking with both single and multicomponent materials, it is recommended to follow Practice D8008 .