Does the glitter effect of organic coloring mica powder pigment have anything to do with the size of the particles?

The flashing effect of organic coloring mica powder pigment is indeed related to the particle size. This relationship is mainly reflected in the following aspects:
Firstly, mica powder itself has a natural optical effect, with its sheet-like structure and transparency allowing light to reflect back and forth between multiple sheets, resulting in a sparkling effect. This flashing effect, also known as "mica flashing", is closely related to the particle size of mica powder.
Specifically, organic coloring mica powder pigments with smaller particles have better dispersibility and transparency, and can be more evenly distributed in the substrate, allowing light to penetrate and reflect more fully, thereby enhancing the sparkling effect. On the contrary, larger organic coloring mica powder pigments may cause uneven light reflection due to uneven dispersion or the formation of larger particle clusters, which in turn affects the presentation of the sparkling effect.
In addition, the particle size of mica powder also affects its specific surface area and surface energy, and changes in these physical properties indirectly affect the flash effect of organic coloring mica powder pigments. For example, mica powder with smaller particles has a larger specific surface area, which can more fully contact the substrate and adsorb dye molecules, thereby improving coloring power and color saturation, and thus having a positive impact on the flash effect.
In summary, there is a close relationship between the flash effect and particle size of organic coloring mica powder pigments. In practical applications, it is necessary to choose the appropriate particle size according to specific needs and effect requirements to achieve the good flashing effect and coloring performance. At the same time, attention should also be paid to controlling the particle distribution and dispersion during the processing to ensure the quality and stability of the product.