The particle size and particle size distribution of talc powder are important indicators for this type of product. Particle size testing is a very important quality inspection in the field of talc powder production and application. Repeatability and accuracy of particle size testing: Repeatability refers to the average deviation between each test value when a sample is tested multiple times. There are many factors that affect repeatability. In addition to the reasons of the instrument itself, it is also closely related to the degree of dispersion of the sample, dispersant, medium, sampling method, operating technique and other testing factors. Repeatability is the primary indicator of a particle size analyzer. If a particle size analyzer has poor repeatability, it has no practical value. So how to ensure the repeatability of the instrument? Firstly, there must be an instrument with stable performance, and secondly, there must be standardized sample preparation and operation methods. B...