The reason that affects the Cosmetic Box For Essential Oil printing quality is equipment cleaning

The reason that affects the Cosmetic Box For Essential Oil printing quality is equipment cleaning

People in the industry often say that the newly bought printing machine at the beginning of the printing machine is very good, but after a long time, it is found that the printing appears white and there is color difference, which seriously affects the quality of the cosmetic box . In fact, the root cause of this problem may not be the device, but you neglected to clean the inside of the device!

Many printing machines have the phenomenon of throwing ink, but the operator only cares about throwing the ink on the cosmetic box, so where does the thrown ink go?

Anilox roller scraping

Long-term ink accumulation will form strips, form hard blocks, and reach a certain thickness, and the ink residue will fall directly on the anilox roller! When the hard block is relatively large, it will be stuck between the anilox roller and the rubber roller or the scraper. Constant friction will scratch the anilox roller for a long time, resulting in small line-like color difference when printing cosmetic box. Be sure to open the cover of the machine for cleaning during maintenance.

Anilox roller is blocked

When the production of the printing press is finished, the ink on the baffle will flow to the anilox roller along the baffle without drying. At this time, the equipment has stopped, and the ink will dry up on the anilox roller after a period of time. Due to the relatively high viscosity of the ink flowing down the baffle, the blockage of the anilox roller will be more serious. When large color blocks are accumulated for a long time, it will always be found that there is a phenomenon of color difference or whitening.

In addition, due to ink problems, printing defects will also occur.

1. Poor hue (cannot lead to standard hue)

Reason: low ink viscosity, ink separation, precipitation, low amount of ink, poor ink transfer

Solution: add original ink, keep stirring the ink tank, increase the amount of ink, check the roller and printing plate

2. Poor viscosity (cannot reach the specified viscosity)

Reason: thixotropy of ink, foam generation, solvent volatilization, too much water dilution

Solution: measure after ink circulation, add defoamer, add special solvent, add original ink and thickener

3. Poor drying of the printed matter (drying too slowly)

Reasons: The viscosity of ink is too high, the ink is piled up, the ink is not dried well, the ink absorption is not good, and the paper is splashed with water

Solution: Dilute the ink, adjust the plate pressure and the height difference of the plate, add a quick-drying agent, and replace the paper with better ink absorption.

Four, pile ink

Reason: uneven thickness of printing plate, too large plate pressure, too high ink viscosity, too large amount of ink.

Solution: Correct the height difference of the layout, reduce the plate pressure, add thinner, and reduce the amount of ink

Five, produce burrs

Reason: The viscosity of the ink is too high, the drying speed of the ink is too fast, the plate pressure is too large, and the paper powder is mixed with it

Solution: Reduce ink viscosity, add slow drying agent, adjust drying speed, reduce plate pressure, filter ink with filter.

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