1.1 该测试方法提供了一种客观的方法来比较测量包装标签中使用的印刷品的易读性。 1.2 该测试方法不是为了量化印刷项目相对于标准品的易读性，而是比较其相对于其他项目的易读性。 1.3 该测试方法使用人类受试者观看安装在专用仪器中的印刷品。 1.4 该测试方法的使用者必须意识到结果可能因受试者的不同年龄组而异。 1.5 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。1.6 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====== 5.1 这种测试方法有助于评估版面、字体、字体大小、颜色和背景对印刷品易读性的影响。 5.2 既往研究 3 已经表明，结果受受试者年龄的影响比任何其他影响都更显著。使用这种仪器时，年龄较大的受试者往往需要更多的光线。由于生活方式和遗传导致受试者以不同的速度衰老，数据的可变性往往随着年龄的增长而增加。该测试方法是使用19至28岁的受试者开发的。建议在需要将变异性保持在最低限度的情况下使用19至28岁的受试者。 5.3 测试人员可以比较不同受试者组之间的易读性（通过受试者的年龄、光强度、距离、视觉特征），以及受试者组内一个与其他标签配置之间的易读性

1.1 This test method provides an objective means to comparatively measure the ease of reading printed matter for use in package labeling. 1.2 This test method is not intended to quantify the legibility of a printed item against a standard but to compare its legibility against other items. 1.3 This test method uses human subjects to view printed matter mounted in a specialized instrument. 1.4 The user of this test method must be aware that results may differ from one age group of subjects to another. 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 ====== 5.1 This test method assists in evaluating the effect of layout, typeface, type size, color, and background on the legibility of printed matter. 5.2 Previous research 3 has shown that results are more significantly impacted by subject age than any other effect. Older subjects tend to require more light when using this instrument. Because subjects age at different rates as a result of lifestyle and genetics, variability of data tends to increase with increasing age. This test method was developed using subjects of ages 19 to 28 years. It is advised that subjects age 19 to 28 be used in cases where variability needs to be kept to a minimum. 5.3 Testers can compare legibility between various groups of subjects (by age, light intensity, distance, vision characteristics of the subjects) and one against other label configurations within groups of subjects