1.1 该测试方法测量涂料隐藏或遮蔽其通过实际应用程序应用的表面的能力。该测试方法涵盖了油漆滚筒的使用，但当应用工具是油漆刷或油漆垫时，该概念预计同样有效。 1.2 以SI单位表示的值将被视为标准值。SI单位后括号中给出的值仅供参考，不被视为标准值。 1.3 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。 1.4 本国际标准是根据《关于制定国际标准的原则的决定》中确定的国际公认的标准化原则制定的，世界贸易组织技术性贸易壁垒委员会发布的指南和建议。 ======意义和用途====== 5.1 建筑涂料的实验室遮盖力测量通常采用叶片型涂敷器，其铺设厚度高度均匀的膜。但是实际的涂敷器，例如辊、垫和刷子，通常涂敷由于不完全流平而缺乏均匀性的膜，导致大多数涂料的实际遮盖力小于在用刮刀涂敷的膜上测量的遮盖力。该测试方法模拟实际应用程序和条件，以便提供当由有经验的工人应用涂料时可获得的实际遮盖性能的指示。它不打算像普通消费者那样复制绘画。5.2 由于涂料的流变特性及其与涂敷器的相互作用是影响因素，因此可能无法获得该测试与通过压降进行的测试之间的等级相关性。

1.1 This test method measures the ability of a paint to hide or obscure a surface to which it has been applied by a practical application procedure. This test method covers the use of a paint roller, but the concept is expected to work equally well when the application tool is a paint brush or paint pad. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units 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 ====== 5.1 Laboratory hiding power measurements of architectural coatings generally employ blade-type applicators that lay down films of highly uniform thickness. But practical applicators, such as rollers, pads, and brushes, typically apply films that lack uniformity due to incomplete leveling, resulting in the practical hiding power of most paints being less than that measured on films applied with a drawdown blade. This test method simulates practical application procedures and conditions so as to provide an indication of the actual hiding performance obtainable when a paint is applied by an experienced worker. It is not intended to duplicate painting as done by the average consumer. 5.2 Since the rheological characteristics of a paint and its interaction with the applicator are influencing factors, rank order correlation between this test and one done by drawdown might not be obtained.