Pearlescent ink is suitable for various printing methods, but various printing processes will have a certain impact on the quality of printed products. In order to ensure the printing quality, the printing process should match the performance of pearlescent ink. Therefore, it is necessary to put forward some requirements for the printing process to meet the performance of printing ink. For example, in the pearlescent offset printing process, the printing speed is fast and the ink viscosity is required to be small. In order to produce the pearlescent effect, thePearlescent PigmentsWhen the particle size is large, the ink roller transfer effect is not very good. When the speed is fast, the friction between the ink rollers is too large, which can easily grind the flake pigments and the pearlescent effect cannot be displayed. If the speed is too slow, it will cause roller failure. In order to pursue the flash effect, the pearlescent pigment with a larger particle size is selected. In order to increase the fluidity of the ink, the printing ink becomes thinner and dries too slowly, affecting the printing speed and forcing the machine to stop. This is a thorny problem in offset printing. Pearlescent pigment

In the gravure printing process of pearlescent ink, although the printed surface has sufficient gloss and a large amount of pearlescent pigment, it is difficult to present the pearlescent glitter effect. This is because the engraved cylinder printing plate only reflects the smaller and weaker reflective particles.Pearlescent powderThe pearlescent pigment is transferred to the substrate, while the larger flake particles remain in the grooves of the printing plate. The amount of pearlescent pigment transferred to the paper surface is insufficient, making it difficult to produce a sparkling effect.

The screen printing process requirements of pearlescent ink are also different from those of other ink printing. In order to match the printing process with the ink performance, when the pigment particle size in the pearlescent ink is larger, it has more multi-faceted reflective properties, forming a very uniform and equal-intensity diffusion, producing a good pearlescent luster.

However, special attention should be paid when selecting the mesh number of the silk screen. The aperture of the silk screen is related to the particle size of the pearlescent pigment used in the printing ink. In order to allow the ink to pass through the printing plate smoothly and leak onto the substrate without blocking the screen on the screen, it is generally required that the mesh size of the silk screen be 1.5 to 2.5 times larger than the larger pigment particles. However, the larger the mesh, the better. Because the silk screen with too low mesh number will affect the accuracy of the graphics, the printed image will be too rough, so the mesh number should be selected appropriately. The manufacturer of pearlescent ink should indicate the particle size of the pearlescent pigment in the ink product packaging for the reference of users when selecting. Generally, it is concluded from experiments that the ink prepared with pearlescent pigments with a particle size of 20 to 180 μm should use 40 to 60 mesh/inch mesh, which can print some products that do not require high precision. If the ink is prepared with pearlescent pigments with a particle size of 5 to 100 μm, a mesh of 60 to 100 mesh/inch can be used to print some finer prints. Pearlescent pigments,Color-changing pigments,Fluorescent Pigments

According to the analysis of relevant data: the percentage concentration (mass) of mica titanium pearlescent pigment in the ink of different printing methods is also quite different, among which the content in screen printing is the lowest. The content in screen printing ink is 8% to 15%; the content in gravure printing ink is 15% to 25%; the content in flexographic printing ink is 15% to 25%; the content in offset printing ink is 30%. Therefore, the use of screen printing will reduce production costs.

In a word, mica titanium pearlescent pigment is a brand-new concept of optical color-changing pigment with broad development space. With the deepening of research, the production cost will be continuously reduced, which will open up a broader road for the widespread application of mica titanium pearlescent pigment in the near future and create more convenience for users to choose products and use them.