Application methods and precautions for green packaging inks 3

Plate, ink roller sticky and scratches/plates and ink guide rollers are stained by ink on the printed material/ink volume is too low and viscosity is high, there are impurities in the ink, the ink dries quickly or slowly, plates and rollers The plated layer on the bar has wear or insufficient hardness or plate statistics, deep paper, plastics, etc. Dust increase / replace the double-sided tape, adjust the pressure and high-speed blade and roller angle, reduce the amount of ink or replace the ink, increase the quick-drying Solvent or oil, revision and roller, re-glazing chrome to prevent paper, plastic and other powder dust off.

Poor adhesion and scratching/Easily rubbed off/The surface of the plastic material of the paper is too smooth and dense. It is not appropriate to use slow-drying ink. The resin content of the ink is too small, the surface treatment is poor, and it cannot dry and float on the surface of the substrate at one time. The top is easy to wipe off, commonly known as skin coke bones.

Improve ink type, adjust ink suitability, process; Print material, use ink with high viscosity and high ink density, increase printing pressure, reduce thickness of ink film, reduce printing speed, and adopt high-efficiency additives and viscosity-increased inks and change impact Ink drying gradient solvent or oil, exchange ink or thinner, should be aware of the ink's adaptability.

Residual irritating odor / ink with too high proportion of methanol and odor-laden solvents or oils / inks Minimizes or does not use irritating or harmful health solvents or oils / exchange inks or replace solvents or oils .

Inaccurate tones and ink deposits/lights, discoloration, discoloration, stencil, quality/sample incompatibility, poor affinity for fillers and bonds, coagulation or severe delamination (dilutions down), insufficient mixing before use, ink During the storage period, it should be stored in a cool, dry and ventilated place. The color tone can be adjusted or exchanged to the closeness value of the sample hue. You can also add 1-3% of the white ink to the ink or increase the filler to increase the hiding power.

Pinholes and skid/print patterns Chemical pinholes and mechanical pinholes/or full plate spots and inks are spilled during printing and lots of foam/ink viscosity is too low. New ink or resin ratio should be exchanged to increase Viscosity, increase fluidity, increase printing speed, add moistening and plasticizing defoamer, eliminate foam, and the pattern depth should be changed to 25-30 micron pattern.

Embedded plates and orange peels/inks have high viscosity, many impurities, rapid drying, and unbalanced solubility. Ink is not level/resulting in watermark and orange peel reproduction and ink residue and drying in the embossed holes also results in poor printing gloss. The concentration is too light, the thixotropy leveling is poor, the affinity between the printing plate and the paper, plastics, etc. is not good, the auxiliaries are unfavorable, the printing speed is slow and the static effect is caused by/high speed is about 0.012 seconds, the medium speed Why about 0.055 seconds, the low speed is 0.09 seconds, and the single sheet is 0.012 seconds (the time required for the ink to transfer to the printing material).

The angle of hot or cold wind blowing is 90 degree direct blow or improve the ventilation condition, add its solvent, reach the solubility of the solvent or ink and ink, change the ink assistant, reduce the static electricity and try to adjust the tone to the gray balance.