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. For this reason, some requirements need to be put forward for the printing process to meet the performance of printing ink.

In the gravure printing process of pearlescent ink, although the surface of the printed product has enough gloss and a large amount of pearlescent pigment, it is difficult to present the pearlescent flash effect. This is because in the printing plate of the engraved roller, only the finer and less reflective pearlescent powder is transferred to the substrate, while the larger flaky particles are still retained in the grooves of the printing plate. The amount of pearlescent pigment transferred to the paper surface is insufficient, and it is difficult to produce a flash effect.

The screen printing process requirements of pearlescent ink are also different from 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, which will form a very uniform and equal-intensity diffusion and produce a good pearlescent luster.

However, special attention should be paid when selecting the mesh number of the screen, as the aperture of the 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 be printed on the substrate without blocking the screen, the screen aperture is generally required to be 1.5 to 2.5 times larger than the pigment particles. However, the larger the mesh, the better, because a screen with too low a mesh number will affect the accuracy of the graphics, and the printed image will be too rough, so the mesh number should be selected appropriately.

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 relatively low. 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.

The above is the question of the influence of printing technology on the effect of pearlescent pigment ink. Mica titanium pearlescent pigment is a new concept of optical color-changing pigment with broad development space. If you are also interested, you are welcome to leave us a message to discuss.