The choice of pearlescent pigment in the formulation of the ink size

In the formulation of the ink, a thickener may be added to prevent settling or pre-wetting of the pearlescent pigment and then dispersed in the binder to avoid agglomeration or settling. Since mica titanium pearlescent pigment has good dispersing ability, it creates superior conditions for ink manufacturing. In low-viscosity ink media, good dispersion effect can be obtained by using low-speed stirring. At the same time, it is possible to avoid the use of equipment such as a three-roller, a high-speed mixer or a ball mill in the manufacture of other inks, since it causes the mica titanium pearlescent pigment particles to be broken and tarnished. Even if the above equipment must be used for dispersion in production, it should be arranged in the final stage of the ink production process to add mica pearlescent pigment to the mixture.

       For the selection of flake pigments, the relationship between the flake size and the glittering effect should be mastered: the larger the flake diameter, the larger the distance between the flash sources (the distance between the flakes and the flakes), and the more the glittering effect is dispersed. This is because the larger the film diameter, the more chances of multiple reflections and refractions of the light received by the surface, so the flash intensity is strong; if the film diameter is small, the flash source spacing is small, the flash effect is concentrated, and the reflection and refraction are repeated. With less chance, the flash intensity will be weaker. In addition to the relationship between the size of the film and the light, it is also related to the state of the pigment in the ink. Generally, the smaller the film diameter, the easier it is to agglomerate, and it is easy to settle in the binder. The smaller the aspect ratio of the particles, the easier it is in the binder. Suspended.