How does particle size affect a pigments dispersibility?
The sizes and shapes of particles of pigments have great impact on the colors of these pigments. But, these pigments are available in clusters form instead of individual form. The cluster pigments also effect the tinting strength and grind of these pigments. Many different mechanisms are there, which hold the pigments together as a clusters. The most common mechanism is the soluble materials, and these materials cement pigment particles together in the drying process. When the sizes of the pigments particles start to decrease, theirs surface area also decreases and consequently, the electrical charge in these pigments increases. This increased charge in the pigment particles make them more dispersed.
