Any material that is reasonably insoluble in the dispersion medium can be caused to form a colloidal dispersion. 难溶于分数介质的任何物质都能够形成一种胶体分散体。
The dispersion coefficient of colloids and the distribution coefficient for radionuclides with colloids are also considered as they pertain to the size of the colloid. 胶体的颗粒大小分布，在自然界中，并不是均匀分布的单分散性的胶体，而是不同颗粒尺寸组合的多分散性胶体。
