The fineness of the ink is the uniformity of the size of the pigment (including the filler) particles in the batch ink and the distribution of the pigment and the filler in the binder. Therefore, how the fineness of the ink reflects both the quality of the printed product and the printing rate of the printing plate.
The practice of the process shows that the color printing products use a net pattern printing or field layout containing a small Yin, Yinxian, the printing process is easy to appear dirty quality problems, if not carefully checked and analyzed, may fall into the operational error, that ink Consistency, too much viscosity, too much ink or too much pressure, blindly making some mistakes. As everyone knows, the real reason is that the fineness of the ink is not good, that is, the ink particles are too coarse.
We know that the fineness of the ink is directly related to the properties of the pigment, the filler, and the size of the particles. In general, inks made with inorganic pigments (not including carbon black) have poor fineness and relatively coarse particles, which is closely related to the rolling process of the ink. The more the ink is ground during the rolling process, the more uniform it is, the greater the contact area between the pigment particles and the binder, the finer the ink particles, and the better and more stable the printing performance. Obviously, the fineness of the ink is closely related to the quality of the printed matter. For example, in the case of a printed anilox version, the high-profile and intermediate tone of the 1-4 screens on the layout account for many, if the ratio of ink particles to the area of ​​the dots is higher If it is close to it, it is easy to make outlets emptiness or spread, or even the printing defects of the points are not clean. Therefore, the higher the fineness of the ink, the better the dots on the printed material, the greater the concentration, and the stronger the coloring power. The print quality is high.
The fineness of the ink is low, the pigment is coarse, and the coefficient of friction during the printing process is large, and the printing rate of the printing plate is low. In addition, coarse-grained inks are also prone to paste and ink deposits during printing, as well as uneven distribution of ink and ink. The fineness of the ink can generally be judged by naked eye observation. That is, if the surface scraped by the ink knife shows a smooth and uniform visual effect, the fineness of the ink is good. If the surface of the scraped surface appears as a small layer or a coarse layer of particles, the fineness of the ink on the surface is poor. In addition, it is also possible to use a small amount of ink layer on the coated paper, and then use another layer of paper to grind the ink layer until the ink layer is dragged to a very thin, it is still very smooth, indicating that the fineness of the ink is good. If traces of the ink layer appear, it is clear that the traces are caused by coarse particles of pigments and fillers in the ink, indicating that the fineness of the ink is not good enough. Of course, the above is only judged by experience, and the accuracy of the judgment has certain limitations. To achieve standardized, data-based judgment, only rely on fineness meter to determine the size of pigment particles in order to more accurately detect the fineness of the ink. The specific method of measuring the fineness of the ink with a fineness meter is to dilute the sample ink to a certain degree, place it in the deepest part of the fineness meter, and then use a spatula to move along the groove (to maintain a constant speed) to the shallowest point. The ink particle size can be seen at both sides of the groove. In addition, the size of the ink pigment particles can also be observed with a microscope.
In summary, the fineness of the ink is very sensitive to the quality of the print. To print a high quality product, we must have a high degree of fineness of ink as a guarantee. Therefore, a correct understanding of the relationship between the fineness of ink and the quality of printing, the strengthening of the detection of fineness of ink, the scientific and rational selection of inks that are compatible with the characteristics of the prints, avoiding blindness in the operation process, and preventing such or such printing defects or The generation of quality failures and the actual improvement of product printing quality and printing efficiency are of great significance. (Kang Qilai) ("China Packaging News")
The practice of the process shows that the color printing products use a net pattern printing or field layout containing a small Yin, Yinxian, the printing process is easy to appear dirty quality problems, if not carefully checked and analyzed, may fall into the operational error, that ink Consistency, too much viscosity, too much ink or too much pressure, blindly making some mistakes. As everyone knows, the real reason is that the fineness of the ink is not good, that is, the ink particles are too coarse.
We know that the fineness of the ink is directly related to the properties of the pigment, the filler, and the size of the particles. In general, inks made with inorganic pigments (not including carbon black) have poor fineness and relatively coarse particles, which is closely related to the rolling process of the ink. The more the ink is ground during the rolling process, the more uniform it is, the greater the contact area between the pigment particles and the binder, the finer the ink particles, and the better and more stable the printing performance. Obviously, the fineness of the ink is closely related to the quality of the printed matter. For example, in the case of a printed anilox version, the high-profile and intermediate tone of the 1-4 screens on the layout account for many, if the ratio of ink particles to the area of ​​the dots is higher If it is close to it, it is easy to make outlets emptiness or spread, or even the printing defects of the points are not clean. Therefore, the higher the fineness of the ink, the better the dots on the printed material, the greater the concentration, and the stronger the coloring power. The print quality is high.
The fineness of the ink is low, the pigment is coarse, and the coefficient of friction during the printing process is large, and the printing rate of the printing plate is low. In addition, coarse-grained inks are also prone to paste and ink deposits during printing, as well as uneven distribution of ink and ink. The fineness of the ink can generally be judged by naked eye observation. That is, if the surface scraped by the ink knife shows a smooth and uniform visual effect, the fineness of the ink is good. If the surface of the scraped surface appears as a small layer or a coarse layer of particles, the fineness of the ink on the surface is poor. In addition, it is also possible to use a small amount of ink layer on the coated paper, and then use another layer of paper to grind the ink layer until the ink layer is dragged to a very thin, it is still very smooth, indicating that the fineness of the ink is good. If traces of the ink layer appear, it is clear that the traces are caused by coarse particles of pigments and fillers in the ink, indicating that the fineness of the ink is not good enough. Of course, the above is only judged by experience, and the accuracy of the judgment has certain limitations. To achieve standardized, data-based judgment, only rely on fineness meter to determine the size of pigment particles in order to more accurately detect the fineness of the ink. The specific method of measuring the fineness of the ink with a fineness meter is to dilute the sample ink to a certain degree, place it in the deepest part of the fineness meter, and then use a spatula to move along the groove (to maintain a constant speed) to the shallowest point. The ink particle size can be seen at both sides of the groove. In addition, the size of the ink pigment particles can also be observed with a microscope.
In summary, the fineness of the ink is very sensitive to the quality of the print. To print a high quality product, we must have a high degree of fineness of ink as a guarantee. Therefore, a correct understanding of the relationship between the fineness of ink and the quality of printing, the strengthening of the detection of fineness of ink, the scientific and rational selection of inks that are compatible with the characteristics of the prints, avoiding blindness in the operation process, and preventing such or such printing defects or The generation of quality failures and the actual improvement of product printing quality and printing efficiency are of great significance. (Kang Qilai) ("China Packaging News")
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