Talk about some factors that determine the performance of pearl ink

The printing effect of pearlescent ink is generally determined by the visual reflection of the pearlescent effect, brightness, and color effects. Different printing methods, the effect of the product is also very different. The commonly used printing pearl inks mainly include screen printing, gravure printing, offset printing, and flexographic pearl ink. Among them, the offset printing pearl ink has fine pearlescent luster and strong light refractive index, which can greatly improve the grade of printed materials. The product packaging produced by it is not only beautiful, but also has a certain anti-counterfeiting effect, and is favored by the majority of businesses and consumers.

All packaging materials and labels can be printed with pearlescent pigment offset printing inks. Offset pearlescent inks are relatively difficult to use compared to screen printing and flexographic technology. The viscosity is relatively high, and the pearlescent pigments are particles that are ground using shells. It is difficult to use them. Dissolved in it, resulting in difficult to mix pearlescent pigments and offset inks, even if mixed together, the distribution of pearlescent pigments is not uniform. This means great challenges for offset printing. In the application process of offset printing pearl ink, it is necessary not only to properly mix and properly select and carefully handle the ink, but also to select the appropriate printing equipment according to the characteristics of the pearlescent pigment and apply advanced technology in printing in order to achieve the best Pearl effect.

Some factors that determine the performance of offset pearlescent inks

1, pearlescent pigments fragility and thickness

The commonly used pearlescent pigments are generally composed of mica flakes coated with anatase or rutile titanium dioxide. The sheet structure is very brittle and easily breaks. At the same time, offset pearlescent inks have very stringent requirements for pigment fineness, such as the fineness of mica titanium pearlescent pigments below 25 μm. If the pigment particles are too thick, the transferability of the pearlescent ink is poor, but if the pigment particles are too fine, the pearlescent effect is affected.

2, ink viscosity and fluidity

The special nature of offset pearlescent ink pigments requires that the inks have lower viscosity and fluidity than other common inks, and can meet the floating requirements of pearlescent pigments during printing to achieve the desired pearlescent effect.

3, the transparency of the ink

The pearlescent effect of pearlescent ink depends on the refraction and interference of the incident light. Therefore, the transparency of the offset pearlescent ink has a great influence on the pearlescent effect. If the transparency of the ink layer is poor, the original sufficient light will be absorbed and affect the pearlescent effect.