1.1 本规程涵盖了一种将室内彩色艺术材料样本暴露在通过封闭窗口照射的阳光下的方法。包含八张蓝色羊毛参考资料的卡片 2. 同时暴露。蓝色羊毛参考 2. 3、6和7作为对照，用于确定何时将试样从暴露中移除并对其进行评级。通过为每个试样分配显示相同变色量的蓝色羊毛参考编号，对试样进行评级。 1.2 这种做法可用于指示在正常室内暴露下几个月或几年内会变色的艺术材料，以及在几年内保持不变的艺术材料。 要验证材料在家庭或办公室环境中保持50年以上不变，还不够严格。开发该方法的一个主要考虑因素是保持其足够简单和短，以便在相对较短的时间内无需仪器即可完成。 1.3 只有在使用测试方法不可行时，才应使用本规程评估艺术材料的耐光性 D4303 . 1.4 本规程不适用于评估油含量高的材料，如艺术家油、树脂油或醇酸漆。 1.5 以国际单位制表示的数值应视为标准。 括号中给出的值仅供参考。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 艺术家们可以获得各种各样的艺术材料，如马克笔、彩色铅笔、粉彩、彩色墨水和喷枪颜色。其中许多材料是为临时艺术品而制造的，可能含有在相对较短时间内褪色的颜料和染料。产品标签和制造商文献并不总是提供必要的信息来区分对光稳定的产品和对光不稳定的产品。这种做法可以检查艺术作品中使用的着色材料的一般耐光性； 然而，试验方法 D4303 如果颜色测量仪器和适当的耐光性测试仪器可用，则必须使用。本规程也可用于评估其他类型有色材料的耐光性。

1.1 This practice covers a method for exposing specimens of colored art materials indoors to sunlight coming through a closed window. A card containing eight Blue Wool References 2 is exposed simultaneously. Blue Wool References 2 3, 6, and 7, are used as controls in determining when to remove test specimens from exposure and rate them. Test specimens are rated by assigning each specimen the number of the Blue Wool Reference that shows the same amount of color change. 1.2 This practice may be used to indicate art materials that will change color within a few months or years in normal indoor exposure and those that will remain unchanged for a period of years. It is not rigorous enough to verify that materials will remain unchanged for more than fifty years in a home or office environment. A major consideration in developing this method was to keep it simple and short enough to be preformed without instrumentation in a comparatively short length of time. 1.3 This practice shall be used to evaluate the lightfastness of art materials only when it is not feasible to use Test Methods D4303 . 1.4 This practice is not suitable for evaluating materials with a high oil content such as artists' oil, resin oil or alkyd paints. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 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. 1.7 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 Artists have available to them a wide variety of art materials such as markers, colored pencils, pastels, colored inks and airbrush colors. Many of these materials are manufactured for temporary artwork and may contain pigments and dyes that fade in a relatively short time. Product labels and manufacturers’ literature do not always supply the information necessary to distinguish products that are stable to light from those that are not. This practice makes it possible to check the general lightfastness of coloring materials to be used in works of art; however, Test Methods D4303 must be used if color measuring instruments and appropriate lightfastness testing apparatus are available. This practice may also be used to evaluate other types of colored materials for lightfastness.