English Calendar 2022 cardboard printing color overlap is too thick, how to do?

English Calendar 2022 cardboard printing color overlap is too thick, how to do?

In the printing process, the relative technical content of overprinting and overprinting is relatively high. Nowadays, there are a lot of color matching and overprinting products, and there are often some problems in the operation and adjustment machine. Today, we will take a look at what causes the thick color at the overlap of one color and another color in the cardboard printing of English Calendar 2022. How do you solve it?

1. The ink color sequence is not accurate, for example, trying to use a lighter color to cover the darker color

Measure: Change the order of ink printing, first light color and then dark color.

Cause 2. The ink layer is too thick

Measures: reduce ink layer, with the least amount of ink to achieve the best ink coverage effect.

Cause 3 ink color and ink viscosity is not accurate

Measure: Light color ink must be printed first and viscosity is lower than the second color of ink.

4. Because of ink quality problems or the thickness of the ink layer, the first printing ink drying slow

Measures: improve the ink drying speed by the following ways: reduce the ink concentration; Reduce the thickness of the ink layer with a better scraping device; Change the ink formula to speed up drying; Reducing the speed of the printing press; Reduce the ink flow of roller; Increase the temperature of the dryer.

Cause 5. The ink concentration is too low to be printed on the substrate

Measure: Increase the concentration of the second ink and make it higher than the first ink concentration.

Cause 6. The ink can not be printed on the substrate because it dries too fast

Measures: reduce the drying rate by the following measures: add the solvent to reduce the drying rate; Stop the airflow or heat flow on the plate; Speed up the printing press.

Cause 7. Ink printing for the PH is too high or too low to be printed on the substrate

Measures: adjust the PH value of the ink to meet the specifications recommended by the ink supplier or replace the ink.

Cause 8 because of substrate quality problems, ink dry

Measures: replace the substrate, reduce the thickness of the ink layer, or strengthen the ink drying system.

Cause 9. Ink and the first ink insoluble