Printing ink is composed of pigments, binders, fillers and other components to form a homogeneous slurry mixture. As a viscous fluid ink, due to the different properties of its varieties are also different, that is, thick and thin points, differences in viscosity, fast dry and slow dry and so on. Therefore, the correct understanding and understanding of the role of ink components in inks is of great significance for accurately adjusting ink characteristics, satisfying the suitability of various printing conditions, and improving product printing quality. 
First, the role of pigment in ink
Pigments include pigments and dyes. The colored materials used in printing inks are usually pigments, but also some dyes. They are all very fine colored materials. Pigments are generally insoluble in water and do not dissolve in the binder. Most of the solution is suspended in the solution, and the dye is generally soluble in the binder. Pigments have a great influence on the performance of inks. The relative density, transparency, heat resistance, light resistance, and resistance to chemicals of inks are all related to pigments. The role of pigment in the ink is obvious, its color determines the hue of the ink; its amount determines the concentration of the ink; its use gives the ink a certain degree of consistency and other physical properties; its use affects to some extent Ink drying, oxidative polymerization drying inks are particularly prominent. In addition, the durability of the ink in all aspects is also determined by the pigment. Therefore, due to the variety of inks and their different uses, the use of pigments is also different. This requires the use of suitable inks according to the product application and process characteristics when printing. For example, high-speed multicolor printers should be used to package products with bright light. , fast solid, wear resistant inks to ensure print quality. 
Second, the role of the link material in the ink
The binder is a kind of fluid with a certain viscosity and viscosity, and its function is various. As a carrier of the pigment, solid particles such as a powdery pigment are mixed and connected so that the phase-adhered pigment finally adheres to the print. The binder affects and determines the fixing speed, drying speed, and drying type of the ink, while giving the ink a certain degree of physical properties such as gloss, abrasion resistance, yellowing resistance, and impact resistance, and to a large extent The viscosity, viscosity, yield value, and fluidity of the ink are determined so that high quality inks are derived from high quality binders. If the linking material preparation or production process is unsatisfactory, the ink will not only lack vivid colors and good luster after printing, but it will also cause chain quality problems such as pasting, smudging, strike-through, pull-off and non-inking, and normal printing. Bring some obstacles. Therefore, the binder is a factor that affects the quality of the ink. 
Third, the role of filler in the ink
The filler is a white solid substance that can be uniformly and well dispersed in the binder, in the form of a fine powder. When the fillers are slurried after mixing and grinding in the binder, some are transparent and others are opaque. Common fillers include lead hydroxide, potassium sulfate, magnesium carbonate and calcium carbonate. Filler in the ink can play a role in adjusting the ink consistency, viscosity, viscosity, flowability and yield value, on the other hand, can play a role in adjusting the ink concentration, that is, when the ink concentration is large In the case of adding fillers, dilute effect can be achieved. Filler in the ink although there is a side to play a role, but its performance has many requirements consistent with the pigment, it also plays an important role in the drying effect of the oxidative polymerization drying ink. (to be continued)
Ink composition and performance (on)
January 21 16:02:03, 2019
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