意义和目的
5.1 实验室建筑涂料的覆盖力测量通常使用刮刀涂布机, which can lay films of a height and uniform thickness. 然而, practical applicators such as rollers, MATS, and brushes often apply films that lack uniformity due to incomplete leveling, resulting in the actual hiding power of most coatings being lower than the measured ability of films coated using drafting blades. The test method simulates real applications and conditions in order to indicate the actual hidden performance that can be obtained when painted by an experienced worker. It’s not about replicating paintings like the average consumer.

5.2 Rank-order correlations between this test and those completed by retracement may not be obtained as rheological properties of the paint and its interaction with the applicator are influencing factors.

美国材料试验协会D 5150-92-2017 辊涂法测定建筑涂料的遮盖力

范围
1.1 This test method measures the ability of a paint to hide or block its surface through a practical application. The test method covers the use of paint rollers, but the concept is expected to be equally effective when the applied tool is a paint brush or a paint pad.

1.2 以英寸-磅表示的值应视为标准值. 括号中给出的值是 SI 单位的数学转换，仅供参考，不被视为标准.

1.3 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全和健康实践，并在使用前确定监管限制的适用性.

1.4 本国际标准是根据《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则制定的, 世界贸易组织贸易技术壁垒委员会发布的指南和建议.