GB/T 3780.27-2020 Specification Determination of carbon black aggregate size distribution by disc centrifugal Optical inspection deposition measurement method. It specifies the details of sample preparation, instrument commissioning, centrifugal and Optical inspection measurement operations, including Rotation speed, time, optical path settings, etc., and also specifies data processing and result reporting methods. Aggregate size distribution affects carbon black performance. This standard provides a unified and accurate measurement method for carbon black production, research and application enterprises to help control product mass, optimize product formulation, and promote the standardization and standardization of carbon black industry detection technology.