Particle size, as the name suggests, refers to the size of a single powder particle. However, since powder is an aggregate of countless particles, these particles are usually not all the same size. Therefore, in practical industry and scientific research, the concept of "particle size" typically encompasses three aspects:

In plastic filling modification, the performance parameters of calcium carbonate have an important impact on the quality and processing technology of the final product.

Calcium carbonate (CaCO₃), as an indispensable filler in the plastics industry, has become a key component in plastic products with its excellent performance and economy. It not only improves the performance of plastics, but also effectively reduces production costs, so it plays a vital role in the field of plastic processing.

When choosing talc, at least the "four degrees" of talc itself should be considered, namely: purity, whiteness, flakeness and fineness. Generally speaking, in order to evaluate the quality of talc products, at least the above four factors should be considered. Judging the quality by a single indicator may be incomplete. If someone judges the quality of talc only based on the average particle size, it is very controversial.