1.1 本试验方法包括使用千分尺测量油漆、清漆、清漆和相关产品的干膜厚度。程序A和B使用固定式千分尺，程序C和D使用手持式千分尺。对于厚度小于12.5 μ m(0.5密耳)的膜，不推荐使用程序A和C。步骤B和D所需的最小厚度是能够将样品作为自由膜移除所需厚度的函数。 1.2 程序如下所示: 1.2.1 程序A- 用于测量平面刚性表面涂层的固定式千分尺。 1.2.2 程序B- 用于测量自由薄膜的固定式千分尺。 1.2.3 程序C- 用于测量平面刚性表面涂层的手持千分尺。 1.2.4 程序D- 用于测量自由薄膜的手持千分尺。1.3 以SI单位表示的值应被视为标准。括号中给出的值仅供参考。 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（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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 3.1 该测试方法特别适用于自由膜的测量，对于实验室测试面板上的膜的测量也是令人满意的。3.2 厚度测量的准确度和精确度可能受到涂层的可变形性的影响。本试验方法不适用于在测量仪器载荷下容易变形的涂层。 3.3 当将涂层施加到实验室测试面板上时，厚度测量的准确度和精确度也受到基材均匀性的影响。

1.1 This test method covers the measurement of film thickness of dried films of paint, varnish, lacquer, and related products using micrometers. Procedures A and B utilize stationary micrometers and Procedures C and D, hand-held micrometers. Procedures A and C are not recommended for films less than 12.5 μm (0.5 mils) in thickness. The minimum thickness required for Procedures B and D is a function of that required to enable removal of the sample as a free film. 1.2 The procedures appear as follows: 1.2.1 Procedure A— Stationary micrometer for measuring coatings applied to plane rigid surfaces. 1.2.2 Procedure B— Stationary micrometer for measuring free films. 1.2.3 Procedure C— Hand-held micrometer for measuring coatings applied to plane rigid surfaces. 1.2.4 Procedure D— Hand-held micrometer for measuring free films. 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 ====== 3.1 This test method is particularly applicable to the measurement of free films and is also satisfactory for the measurement of films on laboratory test panels. 3.2 The accuracy and precision of the thickness measurements may be influenced by the deformability of the coating. This test method is not applicable to coatings that are readily deformable under the load of the measuring instrument. 3.3 The accuracy and precision of the thickness measurements are also influenced by the uniformity of the substrate when the coatings are applied to laboratory test panels.