Nowadays, the benzene-free and ketone-free inks are widely used in the industry. It is not a true environmentally friendly ink. It is very simple. The thinner is still an organic solvent. The water-based ink is the real environmental ink, but the water-based ink is not widely used in the industry, but Water-based inks are an inevitable trend in the future. What is the difference between the water-based ink and the solvent ink we use now?


A pigment with high color strength; the binder is composed of water, a resin, an amine compound and other organic solvents. Resin is the most important component in water-based inks. Water-soluble acrylic resin is generally used. The components of the binder directly affect the adhesion function of the ink, the boring speed, and the anti-stick function.


Together, it also affects the gloss and ink transmission of the ink. The amine compound firstly maintains the alkaline pH of the aqueous ink, so that the acrylic resin can supply a better printing effect. The water or other organic solvent is mainly the solvent, the viscosity and the drying speed of the conditioning ink. The auxiliary agent mainly includes: defoaming agent, retarder, stabilizer, weakening agent and the like.


Because the water-based ink is a soap composition, it is easy to generate bubbles during use, so it is necessary to participate in silicone oil as a defoaming agent to press and eliminate bubbles, and improve the ink transfer function. The retarder is used to reduce the drying speed of the hydrophobic ink on the anilox roller and reduce the paste. The stabilizer can adjust the pH of the ink and can also be used as a diluent to lower the viscosity of the ink. The attenuating agent is used to lighten the color of the aqueous ink, and can also be used as a brightening agent to improve the brightness of the aqueous ink. In addition, some water-based inks also need to participate in some wax to add their wear resistance.


Before printing, workers should use Dyne or Dyne to check the surface tension of the film material. The film material must have a surface tension of at least 42 dynes/cm 2 if good UV ink adhesion is to be ensured. If the surface tension of the film material does not meet the requirements before printing, the ink adhesion will be poor.

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