Composition of the hottest ink and its relationshi

Composition of ink and its relationship with printing quality

printing ink plays an irreplaceable role in the printing process, and it has a icing on the cake effect for the decoration of packaging. Today, the Chinese paper industry will take you into printing ink to understand the relationship between ink and printing

printing ink is a paste colloid composed of pigments, binders, fillers and other components. As a viscous fluid ink, due to its different varieties, the performance is also poor, that is, there are thick and thin, viscosity strength differences, fast drying and slow drying, and so on. Therefore, a correct understanding and understanding of the role of ink components in ink is of great significance for accurately adjusting ink characteristics, meeting the creativity of various printing conditions, and improving product printing quality

I. The role of pigments in inks

pigments include pigments and dyes. The colored materials used in printing inks are usually pigments. There are also some dyes, which are colored substances with very fine particles. Pigments are generally insoluble in water and binder, and most of them are in suspension in solution, while dyes are generally soluble in binder. Pigments have a great influence on the performance of inks. The relative density, transparency, heat resistance, light resistance and chemical resistance of inks are all related to pigments. The role of pigment in ink is obvious, and its color determines the hue of ink; Its dosage determines the ink concentration; Its use gives ink a certain consistency and other physical properties; Its use affects the dryness of the ink to a certain extent, especially the ink based on oxidation polymerization drying. In addition, the durability of ink in all aspects is also determined by pigments. Therefore, due to the different types and uses of inks, the matching of pigments is also different, which requires that appropriate inks should be selected according to the use and process characteristics of the products during printing. For example, when printing packaging products with high-speed multi-color printing machine, bright, fast curing and wear-resistant inks should be selected to ensure the printing quality

second, the role of binder in ink

binder is a fluid with a certain viscosity and viscosity, and its role is multifaceted. As the carrier of pigments, it plays a role in mixing and connecting solid particles such as powdered pigments, and making the adhesive pigments finally adhere to the print. With the development of automobile lightweight, binder can not only affect and determine the fixing speed, drying speed and drying type of ink, but also give ink certain physical properties such as gloss, friction resistance, yellowing resistance and impact resistance, and largely determine the viscosity, viscosity, yield value and fluidity of ink. Therefore, high-quality ink comes from high-quality binder. If the binder preparation or production process is not suitable, the printing ink will not only lack bright and glossy colors after printing, but also lead to chain quality failures such as plate pasting, rubbing, through printing, drawing paper wool and non inking, which will bring certain obstacles to normal printing. Therefore, binder is a factor that greatly affects the quality of ink

III. The role of fillers in inks

fillers are white substances that can be evenly and well dispersed in binders. They have developed self-healing plastics, gel or elastomer colored solid substances, which are fine powders. When the filler becomes paste after mixing and grinding in the binder, some are transparent and some are opaque. Commonly used fillers include aluminum hydroxide, potassium sulfate, magnesium carbonate and calcium carbonate. Fillers can adjust the ink consistency, viscosity, viscosity, fluidity and yield value on the one hand, and adjust the ink concentration on the other hand. That is to say, when the ink concentration is large and the hue is deep, fillers can be added to dilute the ink. Although filler plays an auxiliary role in ink, its performance is consistent with that of pigment. It also plays a role in affecting the dryness in ink mainly based on oxidative polymerization and drying

IV. The role of additives in ink

for the printing operator, the printing adaptability of the ink is good, and it can be put into use as soon as the can cover is opened, which is of course the most convenient and easy. However, due to the differences in the temperature and humidity of the printing environment, the characteristics of the printing materials and the printing process conditions, such as the water content and pH value of the paper, the speed of the printing machine, and the overprint method, although the ink varieties are diverse, the proportion of pigments, binders, and fillers used in each ink is almost constant, which often cannot meet the printing suitability requirements of various conditions. Therefore, from the perspective of improving printing efficiency and quality, according to the changing printing conditions, it is beneficial to add some additives to the selected ink to ensure normal printing

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