The use of UV inks in the label printing industry seems to be the consensus in the industry. Whether it is a flexo label or a embossed label, UV ink is used in ink selection. Moreover, when the printing material is extended from the coated paper to the plastic film, it seems that there is no choice but to use the UV ink due to the adhesion of the ink film to the non-absorbent material. Even if it is just the beginning of the label printing industry, the choice of UV ink.
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.
First of all, we must develop mature new products, focusing on the drying and solubility of inks. The key to the problem lies in the choice of aqueous emulsions. In addition, we should learn from the mature experience of flexographic inks. In addition, we must treat them correctly. cost.
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