Color decoration technology analysis - troubleshooting five

5. Floating color, color layering

Due to the difference in size, shape, density, dispersibility, and cohesion of the pigments in the ink, the pigments on the surface and the underlying layer of the ink film are unevenly distributed, resulting in a phenomenon in which the hue of each layer is different.

the reason:
In the process of formation of floating color and ink film, the distribution of the pigment in the solvent is inconsistent, and the ink formulation and the ink distribution process are unreasonable.
(1) When the ink with two or more pigments is blended, since the solvent volatilizes in the interior of the ink layer and the surface is inconsistent, convection is likely to occur and a floating color phenomenon occurs;
(2) The density of pigments in the ink varies greatly;
(3) The operating method and equipment are not suitable for use.

Prevention:
(1) Improve the ink formulation and manufacturing process (such as selecting pigments that are not easily floatable, easily dispersible, and improving the pigment dispersion process);
(2) Adding anti-floating agents, such as silicone oil, has a significant effect on preventing floating color;
(3) Select the appropriate modulation method and equipment.