颜料制造过程中形成的最小粒子称为原始粒子，它以单晶体或者一组晶体存在，粒径非常小。而原始粒子之间以面和面相结形成的团块，称为聚集体，聚集体比较紧密，一般的分散设备很难将其分散成原始粒子。
The smallest particle formed in the process of pigment manufacturing is called the original particle. It exists in a single crystal or a group of crystals, and its particle size is very small. However, the agglomerations formed by the combination of the surface and the surface between the original particles are called aggregates, which are relatively close, so it is difficult for the general dispersion equipment to disperse them into the original particles.