Analysis of Matting Paper Printing Out of Ink

Paper is divided into surface gloss: high light, semi-highlight and matt. "Poor drying performance and slower drying speed" are common problems in the matt paper printing process. Why does the ink fall out when fountain solution, paper pH, ink thickness, environment, and ink are all normal?

Relevant professionals believe that the main reason for the poor drying of matte paper is reflected in the following two aspects:

1, the special nature of matt paper itself

2. The particularity of black ink pigments.

Due to the small degree of sizing, the matt paper has a loose structure and a rough surface, so its absorption is strong and the binder in the ink can be quickly absorbed. The yellow, magenta, and cyan pigments are generally made of inorganic or organic pigments, while the black ink uses carbon black (elemental carbon) as the pigment, and the carbon black is non-drying. In general, black ink is better than other color inks. Dry slowly. In addition, the adhesion of carbon black and the binder is lower than other inorganic or organic pigments. This causes the matte paper to absorb the binder in the ink too quickly and float the carbon black on the surface of the paper.

The use of matt paper is becoming more and more widespread. Some printing companies use post-printing oils to alleviate this problem. This will not only increase the cost, prolong the production cycle, but also the biggest hazard is to change the original characteristics of matt paper, and the color is also affected.

In order to meet the customer's requirement for black ink on the matte paper and solve the problem of “disappearing ink” at the same time, some people have made some attempts. One is to use yellow, magenta, and cyan inks as the network cable version to obtain color ink overlays. Black; second is the use of color method, the yellow, magenta, cyan ink mixed black ink to avoid the black ink in the "carbon black." Because pigments in yellow, magenta, and cyan are basically inorganic pigments, their drying properties and adhesion are significantly better than those of carbon black.

The ink-discharge phenomenon is particularly prominent in the printing of black ink in the field, which has an impact on product quality and production cycle.

Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent