1.1这些试验方法涵盖了炭黑在橡胶中的分散程度。三种试验方法描述如下: 小节 试验方法A-目视检查 3-11 试验方法B-凝聚物计数 12-23 试验方法C-微粗糙度测量 24-34 1.2以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 视觉分散等级与化合物的某些重要物理性质相关。 额定值为5表示分散状态接近最大特性，而额定值为1表示分散状态显著降低特性。通常情况下，视觉分散度等级表示以下化合物质量水平: 视觉分散等级 分类 4到5 高的 3到4 中间的 2到3 低的 1到2 非常低

1.1 These test methods cover the degree of dispersion of carbon black in rubber. Three test methods are described as follows: Sections Test Method A-Visual Inspection 3-11 Test Method B-Agglomerate Count 12-23 Test Method C-Microroughness Measurement 24-34 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== Visual dispersion ratings correlate with certain important physical properties of the compound. A rating of 5 indicates a state of dispersion developing near maximum properties, while a rating of 1 would indicate a state of dispersion developing considerably depressed properties. Normally, the visual dispersion ratings indicate the following levels of compound quality: Visual Dispersion Rating Classification 4 to 5 High 3 to 4 Intermediate 2 to 3 Low 1 to 2 Very low