1.1 这些测试方法涵盖了商业上称为碱性硅铬酸铅的颜料的化学分析，适用于制造商提供的颜料和从液体涂料中分离出来的颜料，但不适用于混合颜料。碱性硅铬酸铅物种的存在应通过X射线衍射分析确认（见规范 D1648 ). 1.2 对于液体涂料，在进行分析之前，必须首先将颜料与载体分离。 1.3 分析程序按以下顺序出现: 小节 氧化铅 6. 到 14 三氧化铬 15 到 23 二氧化硅 24 到 27 水分和其他挥发性物质 28 粗颗粒 29 吸油量 30 质量颜色和着色强度 31 1.4 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。 1.5 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。 1.6 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 这些试验方法可用于确认碱性硅铬酸铅中规定的氧化铅、三氧化铬和二氧化硅含量，并有助于质量控制。

1.1 These test methods cover the chemical analysis of the pigment commercially known as basic lead silicochromate and are applicable to pigment supplied by the manufacturer and to pigment, but not mixed pigments, separated from liquid coatings. The presence of basic lead silicochromate species shall be confirmed by X-ray diffraction analysis (see Specification D1648 ). 1.2 For liquid coatings the pigment must first be separated from the vehicle before conducting the analysis. 1.3 The analytical procedures appear in the following order: Sections Lead oxide 6 to 14 Chromium trioxide 15 to 23 Silica 24 to 27 Moisture and other volatile matter 28 Coarse particles 29 Oil absorption 30 Mass color and tinting strength 31 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 ====== 3.1 These test methods may be used to confirm the stated lead oxide, chromium trioxide and silica content of basic lead silicochromate and is useful for quality control.