The problems that water-based inks are prone to appear in the process of using

Water-based inks are mainly water-based, so there will be phenomena such as poor curing, slow drying, uneven ink color, and blurring

1.

Reason analysis: the ink penetration is too low or the pigment content in the ink system is low or the color purity is deviation, the ink is analyzed and precipitated during printing, and the transfer is not good

2.

Reason analysis: the ink has thixotropy, foaming, and the solvent is volatile

3.

Reason analysis: the print does not dry or even sticks to the hand within the expected time

4.

Reason analysis: the high-profile part of the printed product is blurred.

5.

Reason analysis: the quality of the printing plate f is too soft or the elasticity of the cushion plate is too large, the contact is too tight, the pressure is too large, the ink privacy is too low, the ink mixing is poor

6.
Poor transfer

Reason analysis: insufficient printing pressure, too high hardness of printing plate, too strong water resistance of paper, etc.
, ink roller wear and aging
.
Increase the printing pressure and use hydrophobic ink to check the wear and aging of the ink roller
.
Add TM-20 .
Coupling agent.
Replace the worn out metal anilox roller
.

7.
Difficult to register, multi-color register is inaccurate

Analysis of the reason: the printing pressure of the good sales color ink is too large, and the color ink dries too fast when the sales volume is good
.
The printing pressure of good colors should be increased, and the printing pressure of good colors should be light
.
Adding an appropriate amount of TM-200S coupling agent, the privacy of the well-selling ink should be lowered and adjusted to the dryness of the well-selling ink, or the ink film will not be completely dried, and then the good ink will be printed (overcoming the surface vitrification) The printing plate swells and protrudes and deforms, replace the paper
.

8.
The ink foams, and the foam overflows after the ink is circulated in the ink fountain of the printer

Analysis of the cause: Insufficient ink circulation, too much water, too much pump circulation, air leakage in the tube, and too thin ink
.
Appropriately add defoamer (0.
2% is a good mix of internal and external plasticizing defoamers) to reduce the circulation of the pump and replenish with new ink so that it is not excessively diluted.
Check the tube to prevent air leakage
.

9.
Chemical pinhole

Reason analysis: excessive addition of antifoaming agent, too much ink dilution, low privacy ink and too much ink
.
Note that about 0.
2% of defoamer is added
.
It should be mixed with the original ink and mixed well before printing
.

10.
Printing plate wear

Reason analysis: the contact is too tight, the printing pressure is too heavy or the texture of the printing plate is good
.
Adjust the contact, adjust the printing pressure to replace the printing plate or add a 3mm plastic foam sheet behind the plate
.