1 Corrugated printing characteristics of water-based ink
Large water-based ink to fall into two categories: ① Rosin - maleic acid-modified resin series (low-grade); ② acrylic resin series (high-grade).
(2) the requirement for water-based ink
① long-term storage precipitate, after stirring should be easily re-dispersed;
② have good flow properties and viscosity;
③ have good storage stability;
④ faster drying performance and appropriate;
⑤ plates and printing can not have any adverse effect;
⑥ not have much of a pungent odor.
3 water-based ink technical parameters
① Color: with the standard version approximation (Note: the test sample and the standard samples are not connected to similar color wheel manually Exhibition Exhibition color contrast);
② fineness: less than 20um, instrument :0-50um Fineness gauge;
③ Viscosity: 20 ± 5s, instrument: RIGOSHA4 # cup (25 ℃);
④ PH value :8.0-9 .5 equipment: Portable PH meter (PHB-2 type);
⑤ heavy metals: Meet the World Packaging environmental protection standards;
⑥ the patience: meet the requirements.
4 requires the proper use of water-based ink
① stir before use, to maintain uniform ink composition;
② Open the ink deposit after use should be closed immediately sealed, to prevent dust falling and dry solid crust;
③ I ink containing impurities should first filter, matched with new ink used together;
④ close to high temperature during storage or avoid sun exposure, under normal conditions, are stored for a year without deterioration;
⑤ If you find the application of ink viscosity is slightly larger, you can add water to make adjustments.