Like the general printing ink composition, the aqueous ink is usually composed of a coloring agent, a binder, an auxiliary agent and the like. The colorant is a coloring substance of the aqueous ink, giving the ink a specific color. In the flexo printing, in order to make the imprint bright, the coloring agent generally uses a pigment with good chemical stability and high tinting strength; the binder is composed of water, a resin, an amine compound and other organic solvents.
Therefore, I think the heater plays an important role in graphic production. However, some problems have also been presented during the practice test. For example, the problem of the copper plate of the printer is not well controlled, and it is not easy to dry, simple to fade, slow, the adhesion of the ink is not strong, and some papers are printed with ink. So is there a better way to deal with these problems now? The answer is yes.
Imitation printing ink is also weakly soluble ink, so many people are worried that this ink is corrosive, so it is daunting to him. Yes, since it is dissolved in ink, the corrosiveness is inevitable, but the pH of this ink is not very high, weak base, and some taste. In fact, we use the general ink does not rule out the damage to the machine nozzle. If the quality of the ink is not good, it will damage the nozzle. I used a company's pigment ink to break the nozzle. So the question is how to look at this problem, if we are getting a good reward, it is still possible to dedicate something.
The physicochemical properties of different pigments, such as relative density, acidity and alkalinity, polarity and crystallization, are different. Therefore, if a variety of pigments and fillers are used in the process of manufacturing inks, often because of the large difference in physicochemical properties, even if they are strongly stirred, they can only be temporarily dispersed in the ink. When the storage time is long, pigment precipitation and floating color often occur. And so on. Therefore, the types of pigments and fillers used in the production of ink should be as small as possible. But sometimes in order to achieve hue and performance requirements, several pigments have to be used.
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