1.1 本试验方法 2. 涵盖了通过将拉下胶片中产生的脊与一系列摄影水平标准进行比较，对白色和浅色的水和溶剂还原性建筑涂料的相对水平进行实验室测定（见 附件A1 ). 1.2 本试验方法中使用的倾斜照明产生的阴影无法轻易评估无色素、纹理和深色涂层。这种涂层可以通过在不同反射角度下与塑料标准进行比较来进行评级。为此，普通的房间照明是令人满意的。 1.3 由于其他因素可能会影响液体涂料的流挂趋势，因此本试验方法不用于测量流挂。 1.4 以国际单位制表示的值应被视为标准。括号中给出的值仅供参考。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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，并确定监管限制的适用性。 1.6 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====== 4.1 整平会影响所涂建筑涂料的隐蔽性和外观，光泽和半光泽饰面的刷痕和表面不规则性比平面饰面更明显。通过该试验方法对平整度的仪器评估已被证明与刷涂法的评估相关。

1.1 This test method 2 covers the laboratory determination of the relative leveling of water and solvent-reducible architectural paints in white and light tints by comparing the ridges produced in a draw-down film to a series of photographic leveling standards (see Annex A1 ). 1.2 Unpigmented, texture, and deep-tint coatings cannot be readily evaluated with the shadowing produced by oblique lighting employed in this test method. Such coatings may be rated by comparing them with the plastic standards at various angles of reflection. For this purpose ordinary room lighting is satisfactory. 1.3 Since other factors may influence the tendency of liquid paints to sag, this test method is not intended to measure sagging. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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. 1.6 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 ====== 4.1 Leveling can affect the hiding and appearance of applied architectural coatings, the presence of brushmarks and surface irregularities being more conspicuous with gloss and semi-gloss finishes than with flat finishes. Instrumental evaluations of leveling by this test method have been shown to correlate with those made by brush application.