1.1本试验方法包括测定炭黑相对于工业着色参考黑（ITRB）的着色强度。 1.2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。 1.3 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====== 4.1对于广泛的商用橡胶级炭黑，着色强度高度取决于粒径。着色强度可作为颗粒大小的指标；然而，着色强度也取决于结构和骨料粒度分布。因此，炭黑等级内着色强度的差异可能反映粒径以外的差异。 注1 — 本试验方法主要用于N100、N200和N300系列炭黑的表征。 4.2使用用于制备炭黑氧化锌糊料的胡佛穆勒装置，开发了炭黑行业内的着色强度值。一种新的混合装置，SpeedMixer 3. （DAC 150 FVZ）和相应的程序在D24中进行了广泛的研究，并证明为所有胎体或软黑色和大多数胎面黑色提供同等的着色强度，但较高表面积的N100类型和特殊黑色除外。因此，该替代仪器的用户有责任确保其产品充分分散。用户和生产商之间产生的争议应使用胡佛穆勒仪器解决，直到ASTM开发出足够的精度声明。 4.3 ITRB一词在全文中用于原始ITRB和后续参考材料ITRB2，前者用作着色测试的第一个参考材料，但现在已用完。 如有需要，如在计算中区分原始ITRB和ITRB2至关重要，这将在测试程序文本中明确提及。

1.1 This test method covers the determination of the tint strength of carbon black relative to an industry tint reference black (ITRB). 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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 ====== 4.1 For the broad range of commercial rubber grade carbon blacks, tint strength is highly dependent upon particle size. Tint strength can be used as an indication of particle size; however, tint strength is also dependent on structure and aggregate size distribution. Therefore, differences in tint strength within grades of carbon black may reflect differences other than particle size. Note 1 — This test method was developed primarily for the characterization of N100, N200, and N300 series carbon blacks. 4.2 Tint strength values within the carbon black industry have been developed using a Hoover Muller apparatus which is used to prepare carbon black-zinc oxide pastes. A new mixing apparatus, SpeedMixer 3 (DAC 150 FVZ), and a corresponding procedure have been extensively studied within D24 and shown to provide equivalent tint strength for all carcass or soft blacks and most tread blacks with the exception of higher surface area N100 types and specialty blacks. Therefore, it is the responsibility of the user of this alternate apparatus to ensure their products will adequately disperse. Disputes arising between a user and producer should be resolved using the Hoover Muller apparatus until ASTM develops adequate precision statements. 4.3 The term ITRB is used in the entire text for both, the original ITRB, used as the first reference material for tint testing, but which is now used up, and the successor reference material, ITRB2. Wherever required, like in calculations where it is crucial to differentiate between the original ITRB and ITRB2, this will be clearly mentioned in the text of the test procedure.