GB/T 3780.6 - 2016 specifies the determination method of carbon black Color-Strength in detail. The standard covers the preparation of the sample, the calibrating of the instrument and equipment, and the specific test operation process. The details and requirements of each step are clearly explained, and the calculation and representation of the results are clarified. Color-Strength is a key performance indicator of carbon black, which is related to its application effect in inks, Coatings and other industries. This standard provides a unified and accurate detection method for carbon black production enterprises, Quality inspection organizations and related application industries, effectively guarantees the mass of carbon black products, and promotes the standardized development of the carbon black industry.