How to improve the printing quality of silver ink

The silver ink color gives people a rich and colorful feeling. In the packaging and decoration, trademark labels and books and cover products, silver silver color is appropriately decorated to make the printed products more beautiful and elegant, and the grade of the products will be improved. Therefore, how to improve the printing quality of silver ink is of great importance.
First, understanding and understanding of the characteristics of silver ink, to improve the silver technology base Silver ink's main material is "silver" powder, it should be said that it is a kind of silver aluminum powder. The difference in the particle size of the silver powder, the resulting metallic luster is also not the same. The coarse silver particles have a stronger reflection and luster; on the other hand, the fine silver particles have a weaker reflection gloss. The number of silver powders in the printed silver ink is generally 400 to 1000 mesh. In other words, silver ink formulated with 1000-mesh silver powder has a relatively poor metallic color effect, and 400-mesh silver powder-modified silver ink has a good metallic gloss and is suitable for printing large-area products. The proportion of silver powder is small, it is easy to float in the liquid, and the hiding power is stronger than that of the spectral color ink. Its chemical properties are stable, its light and heat reflection properties are good, its heat resistance is also good, and its discoloration is not easy under high temperature conditions. However, silver powder is not acid-resistant. When it encounters acidic substances, it will cause a chemical reaction and reduce the metallic luster of the imprint. Therefore, this characteristic should be paid attention to when adjusting the ink and printing, and the neutral auxiliary material is used for ink transfer.
Second, the scientific and rational design of printing silver layout, improve the quality of printing silver printing quality is interactive, if the layout of the silver ink printing characteristics are not understood and recognized, so that layout design defects, is bound to directly affect the quality of printed products Stable, so layout and printing process should be coordinated.
1. Pay attention to the rationality of the layout and prevent the occurrence of printing defects. Because the silver ink particles are larger than the general ink particles, the transfer performance is relatively poor, and it is prone to paste defects. Therefore, the silver printing surface should not have the lines of small Yin and Yang characters, and it is even more unsuitable for printing the texture patterns.
2. It is necessary to arrange the printing sequence and improve the printing quality. The layout of printed silver ink is best considered in the last color to highlight the silver color. If you want to overlay other colors on the silver, the area of ​​the one-sided graphic should be smaller, so as not to affect the performance of the silver, and it can prevent the printing defects of overprinting, which is better than other inks. Easy to fade quality defects;
3. Silver is printed on the background to improve the effect of printing silver. The silver ink is printed on the white ink or silver-gray ink layer with strong hiding power, which can not only save the silver ink but also improve the gloss of the silver ink layer. If the silver ink is overprinted on the transparent yellow background ink, the golden gloss printing process effect can be achieved because the transparent yellow has the characteristics of small specific gravity, strong coloring power, good transparency, and fine particle oil content, reflected by the silver ink light. The role of the ink layer to achieve the gold effect, can play a role in the replacement of gold ink printing. The advantage of this process is that it is not as likely to undergo oxidative discoloration as gold ink, so it can maintain golden luster.
Third, the good technology and customs to ensure the quality of Yinyin products 1, the paper performance must be compatible with the characteristics of silver ink printing process. Only by choosing the right paper can the silver effect be better. Papers with stronger ink absorbency, such as offset paper and letterpress paper, cannot exhibit the metallic luster of silver ink after silver printing, and are not suitable for printing silver. The coated paper with good paper gloss, glass cards, and whiteboard paper (secondarily) can be used for printing silver. The metallic luster of silver ink can give a sense of artistic beauty.
2, to put a good pad version of the process technology. Silver ink is printed by letterpress printing. The plain cloth and even pressure can achieve the effect of fully expressing the metallic color and gives a sense of art. Therefore, in the process of loading plates, the technical aspects of the pad printing process should be emphasized. Because products of different printing plates are printed on the same product, the quality of the ink color will obviously be different. For example, the plywood used in the traditional process serves as the silver printing plate bottom. For printing, due to the poor flatness of wood floor, large flexibility, poor solidity, it is difficult to maintain a constant printing pressure, it is easy to produce printing pressure unevenness, imprinting ink (ink layer) is not strong and the quality of ink color defects . Therefore, the Yinyin Deco should adopt the metal plate tray, which has good dryness and solidity, and the printing pressure is relatively uniform. The printing ink layer effect is good. In addition, the printing silver should also be a good lining process technology, soft, the nature of the lining deformation coefficient is large, prone to uneven pressure, the ink layer of bad flowers, it should use a small compression deformation coefficient of the hard package Lining, used for printing silver ink products, can make the ink color flat and strong. For field editions, lines, and text layouts, the technical aspects of the pad printing process play a crucial role in the quality of printing. Therefore, it is appropriate to increase the printing pressure on the site layout, and the printing pressure on lines and text layouts. Should be appropriately reduced, so that the layout of the field can achieve even, thick ink layer, good visual effects; lines and text layout can avoid the imprint expansion, paste, blurred writing and other ills.
In summary, the factors affecting the quality of Yinyin products are many, and some of them are complementary. Therefore, the overall technical control and quality control of the entire silver printing process is not only the need to increase production efficiency, but also the quality of products. To meet the urgent requirements of the market, the significance of the technical research and operation of the silver printing process is even more important. (From "China Packaging News")