Regarding the water resistance of ink in card game printing wholesale, it is of great significance for the lithography based on the incompatibility of water and oil. Printing inks with weak water resistance often appear in the printing process, which seriously affects production and quality. It can also form the emulsion of ink; It can reduce the viscosity and the change of color of imprinting, and can extend the drying time. Therefore, we must choose the right water resistance ink to operate in the printing, so as to ensure the printing quality of the product. So how should the water resistance of the ink be judged?

The water resistance of the ink depends on the following aspects

The first is the stability of the ink structure, if the orange structure is strong, it is not easy to be broken by water. The strength of this structure depends to a large extent on the properties of the pigment.

Secondly, it depends on the wetting effect of the binder on the pigment. Water resistance On the other hand is the nature of the binder itself, generally speaking, the water resistance of large molecules is strong, and the water resistance of small molecules is weak. From this point, it can be explained why zero oil has strong water resistance, so zero oil can be added to card game printing wholesale to remedy the inks with weak permanent resistance.

In addition to the above two aspects, if there is a large amount of surface activity in the water tank solution, it will be easier to reduce the water resistance of the ink.

Generally, to determine whether the ink is water-resistant, it is often to pour water on a part of the ink surface, so that the ink is partially submerged in water, and a part is exposed to the water, and to observe the discoloration of these two parts. In general, the color of the part in the water is slightly more submerged than that of the part without water. But this observation can only obtain a phenomenon of one nature, and it will not be very correct. The more accurate determination method is to interact with a certain component solution and make the ink emulsify. Since the emulsion is not very stable, it will separate from each other after a certain time, and the speed of its separation speed can be regarded as the scale of the water resistance of the ink. The faster the separation, that is, the shorter the solid during separation, the ink is not easy to emulsify, that is, the stronger the water resistance, and the other way around.

Another way is to weigh 0.5 grams of ink, placed on the glass plate, covered with ten pieces of filter paper soaked in distilled water, and then covered with a glass plate on the filter paper, and then pressed on a weight of one kilogram, after 24 hours, watching the filter paper, the first piece of ink does not count, if the second strong did not touch the ink, then the ink resistance is excellent, if the ink is below two pieces, This ink water resistance can also be, in more than three sheets, this ink water resistance is not good, in the printing prone to "water", "emulsification" and other ills, so it can not be used.

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