Liquid ink common faults and countermeasures

First, printing ink:

Paste phenomenon: the ink on the printing plate is dry and the pattern of the print is not clear.
the reason:
1 The ink is drying too fast 2 The viscosity of the ink is too high 3 The speed of the printing machine is too slow
1 Add slow-drying solvent 2 to reduce ink viscosity
3 increase the printing speed
Dirty, sticky phenomenon: the printed pattern is contaminated, or the adhesion between the prints
the reason:
1 The ink dries too slowly 2 The ink viscosity is too high 3 The printing speed is too fast
1 Improve ink dryness 2 Reduce ink viscosity 3 Reduce press speed
Ranunculus Phenomenon: Frizzing on the edge of printed matter
the reason:
1 poor ink viscosity control 2 printing pressure is too large
3 ink scraper is uneven
Countermeasures:
1Adjust the ink viscosity
2 adjust the pressure roller barrel
3 Replace the squeegee

Second, water-based ink

Paste version:
Symptoms: The ink on the plate is dry and the pattern of the print is not clear.
the reason:
1The ink is drying too fast 2The viscosity of the ink is too high 3 The speed of the printing machine is too slow
1 Add slow-drying solvent 2 Reduce ink viscosity 3 Increase printing speed 4 Adjust printing pressure
Dirty, sticky phenomenon: the printed pattern is contaminated, or the adhesion between the prints
the reason:
1The ink is drying too slowly 2The viscosity of the ink is too high 3The speed of the printing machine is too fast 4Pressing excess pressure Countermeasure:
1 Improve the dryness of the ink 2 Reduce the viscosity of the ink 3 Reduce the speed of the printing press 4 With the printing pressure
Frizz, beard phenomenon: Fringes, beards on the edges of prints
the reason:
1 Poor ink viscosity control 2 Dry ink too fast 3 Pressure too much
1 Adjust the viscosity of the ink 2 Reduce the dryness of the ink 3 Adjust the printing pressure
Bubble phenomenon: more bubbles in the ink tray
the reason:
1 Ink pump causes air to mix in with air bubbles 3 Ink quality is poor:
1 Add defoamer 2 replace ink

Third, composite packaging ink

Paste phenomenon: the ink on the printing plate is dry and the pattern of the print is not clear.
the reason:
1 Ink drying too fast 2 Improper printing speed 3 Excessive printing viscosity
1 Add 3%-8% of drying agent 2 Adjust the printing speed 3 Adjust the dilution solvent ratio
Electrostatic phenomena: Bearded, splattered, misted, or rounded shapes on the print.
the reason:
1 The viscosity is too low, the speed is too fast 2 The ink density is too high 3 Electrostatic effects:
1 increase the viscosity, reduce the speed 2 reduce the concentration 3 increase the antistatic agent and isopropyl alcohol or ethanol
Non-graphic phenomenon: Leaking scraper to print
the reason:
1 The printing speed is too fast 2 The ink viscosity is too high 3 The ink re-solubility is poor Countermeasure:
1 Decrease the printing speed 2 Adjust the diluent ratio 3 Add a small amount of butanone and toluene

Source: Ink Information