1.1 这些测试方法描述了使用电光测量技术测量涂层表面的图像清晰度（DOI）光泽。 1.2 评估的涂层应应用于平面刚性表面。 1.3 试验方法-- 通过一个小狭缝的光被投射到样本表面上，并通过滑动梳状快门测量其反射图像强度，以提供图像清晰度的值。 1.4 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 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）。本标准的使用者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 光泽涂层表面外观的一个重要方面是其反射的图像的清晰度。在该测量程序中获得的值与DOI（图像清晰度）的视觉评级很好地相关。 4.2 尽管测试方法 D523 和 D4039 在表征光泽外观的某些方面是有用的，但它们不能提供令人满意的DOI（图像清晰度）评级。 4.3 给定的测量条件符合试验方法中规定的条件 E430 。 4.4 本试验方法中给出的测量条件符合ISO 10216中规定的条件。 4.5 用该测试方法的测量程序获得的标度值在0到100的范围内，其中100的值表示完美的DOI（图像清晰度）。 4.6 DOI（图像清晰度）标度值本身并不表示反射图像清晰度降低的任何特定原因。 表面不规则性，如雾、橘皮和皱纹，当存在时，可以被认为是图像清晰度降低的原因。

1.1 These test methods describe the measurement of the distinctness-of-image (DOI) gloss of coating surfaces using electro-optical measuring techniques. 1.2 The coatings assessed shall be applied to planar rigid surfaces. 1.3 Test Method— The light through a small slit is projected on the specimen surface and its reflected image intensity is measured through a sliding combed shutter to provide a value of image clarity. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 An important aspect of the appearance of glossy coating surfaces is the distinctness (clarity) of images reflected by them. The values obtained in this measuring procedure correlate well with visual ratings for DOI (image clarity). 4.2 Although Test Methods D523 and D4039 are useful in characterizing some aspects of glossy appearance, they do not provide satisfactory ratings for DOI (image clarity). 4.3 The measurement conditions given conform to the conditions specified in Test Methods E430 . 4.4 The measurement conditions given in this test method conform to the conditions specified in ISO 10216. 4.5 The scale values obtained with the measuring procedures of this test method range from 0 to 100 with a value of 100 representing perfect DOI (image clarity). 4.6 The DOI (image clarity) scale value does not, of itself, indicate any specific cause for reduction in reflected image sharpness. Surface irregularities such as haze, orange peel, and wrinkle, when present, may be cited as causes for reduction of image sharpness.