Analysis the determinants of performance offset pearl ink

Pearl ink printing effect is generally through the visual effect of pearl essence reflects the brightness and color effects to determine. Different printing methods, effect of the product is also very different. Generally used mainly silk screen printing pearl ink, gravure, offset, flexo pearlescent ink, which offset pearl ink with a more delicate pearl-like luster and strong refractive index, to a large extent, enhance the quality of printed materials, with its production of the product packaging is not only beautiful, but also has a certain effect of security by the majority of businesses and consumers.

All packaging materials and labels pearlescent pigments can be used for printing offset inks, offset pearl ink compared to screen printing, flexo technology is relatively difficult, due to the relatively high viscosity, while the pearlescent pigment is milled out of the shell particles, it is difficult dissolved therein, resulting pearlescent pigment and printing ink is difficult to mix, even mixed together, the distribution of the pearlescent pigment is not uniform. This is offset, means a great challenge. Offset pearl ink in the application process, not only the need for a reasonable allocation of inks and substrates proper selection, careful handling, you also need to select the appropriate printing equipment pearlescent pigments based on the characteristics and application of advanced technology in printing in order to achieve optimal pearlescent effect.

Some factors that determine the performance of offset pearl ink

1, pearlescent pigments fragility and fineness

The most commonly used pearlescent pigments are generally covered by anatase or rutile titanium dioxide mica flakes structure, sheet structure, very crisp, very easily damaged. Meanwhile offset pearl ink pigment fineness requirements are very strict, such as grain fineness Mica Pearlescent pigments in 25μm or less. If the pigment particles are too coarse, the pearlescent ink transferability poor, but if the pigment particles are too small, the impact of the pearlescent effect.

2, ink viscosity and fluidity

Particularity offset pearlescent pigment ink, the ink requires lower than other ordinary ink viscosity, mobility, in order to meet the requirements of floating pearl pigment printing, so as to achieve the desired pearl effect.

3, the transparency of the ink

Pearlescent effect depends on the incident light pearl ink refraction and interference effect, therefore, the transparency of the pearlescent ink offset has a great effect on the pearlescent effect. If the transparency of the ink is poor, had plenty of light will be absorbed and affect the pearlescent effect.