Pearl powder in the printing process of the rational application of the code of practice

1, how to use pearl powder safely

Pearl powder is a translucent microflake pigment. Inadvertent inhalation of the lungs by the operator will cause corresponding injuries to the body. It is recommended that operators wear masks and rubber gloves before dispensing pearl powder. Open the package and gently put the required amount into the can. After soaking with 30% ethyl acetate or isopropyl alcohol for 30 minutes, it is easy to Operation, but not high-speed stirring, otherwise it will destroy the pearl powder particle size and affect its gloss.

2. How to use pearl powder mixed with pigment

Gravure printing mainly uses low-viscosity liquid inks. The pearlescent pigments should be blended with a transparent material (resin) with good transparency and a transparent diluting agent with good printability. In the preparation of color inks, according to different papers choose different color ink types. White card, white paper should use pigment type color material, PET composite paper should use dye type color material. Color and pearl powder can be mixed, generally not more than 20% of pearl powder. If the hue is too heavy, it will affect the pearlescent effect, because the pearlescent pigment can only have special light interference function in the well-lighted ink layer, and excessive use of other colored pigments will cause a large amount of pearlescent light to be lost.

Method of deployment. Diluter: color ink: pearlescent ink = 75:3:22, depending on the desired effect to add or reduce the proportion of each.

Operation method: First use dilute agent and color ink for deployment (remember: to find out the proportion to be weighed), deploy the sample to be slightly deeper than the required sample draft, then add the soaked pearl powder, evenly stir, and other pearl powder It can be used after it is evenly dispersed in the ink.

3, the rational use of pearl powder on the composite paper

For example, pearlescent inks are printed on PET composite paper. Because the smoothness of the surface of the paper is good, the transfer rate of pearlescent ink is reduced during the printing process, and at the same time, the hiding effect is also poor, and the printed hair reveals the paper color. So in the process of arrangement to take into account the vacant color sequence, printing two times pearlescent ink or base oil, so that the pearlescent light effect will be more clear; no empty color sequence, consider adding appropriate aluminum powder, white ink or transparent pearl ink Ink, so that the pearlescent light effect is slightly lost, but the coverage is increased


Source: PACK.CN

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