Ink is mainly used in the printing industry, is the printing process in the substrate to form graphic information on the substance, so the role of ink in printing is no small matter, it determines the color of the print, clarity and so on. The composition structure of the ink includes the main agent and the auxiliary agent. The main agent of the ink includes color material and connecting material; Additives include color regulator, drying regulator, fluidity regulator and so on.

First, what kind of connection role can the color play in the ink

Colors include pigments and dyes. The colored materials used in printing inks are usually pigments, and there are also some dyes, which are very fine particles of colored substances. Pigments are generally insoluble in water and insoluble in binders, and most of them are divided into suspension in solution, while dyes are generally soluble in binders.

Pigments have a great influence on the performance of the ink, the relative density of the ink, transparency, heat resistance, light resistance and resistance to chemicals, etc., are related to the pigment. The role of pigment in ink is obvious, and its color determines the hue of ink; The amount of it determines the concentration of ink; Its use gives the ink a certain consistency and other physical properties; Its use affects the dryness of the ink to a certain extent, and the ink based on oxidation polymerization and drying is particularly prominent. In addition, the durability of the ink in all aspects is also determined by the pigment.

Therefore, due to the different ink varieties and uses, the matching of pigments is also different, which requires that the printing should be based on the product use and process characteristics of the appropriate ink, such as the use of high-speed multi-color printing machine printing packaging products should be selected bright, fast solid, wear-resistant ink to ensure the printing quality.

Second, what role does the binder play in the ink

Binder is a kind of fluid with certain viscosity and viscosity, and its role is multifaceted. As a pigment carrier, it mixes solid particles such as powdered pigments together, and makes the bonded pigments eventually adhere to the printed products.

The binder affects and determines the fixation speed, drying speed and drying type of the ink at the same time, it can give the ink a certain gloss, friction resistance, yellowing resistance and impact resistance and other physical properties, and largely determines the viscosity, viscosity, yield value and fluidity of the ink, so high-quality ink comes from high-quality binder.

If the bonding material preparation or production process is not appropriate, the ink printing not only lacks bright, good luster color, but also causes paste, dirty, through printing, drawing paper wool and ink and other chain quality failures, which brings certain obstacles to normal printing. Therefore, the binder is a factor that has a great impact on the quality of the ink.

Third, what is the meaning of filling material at this time

The filling material is a white solid substance that can be evenly and well dispersed in the binder, and is a fine powder. When the filler is mixed and ground in the binder to become slurry, some are transparent and some are opaque. Commonly used fillers are aluminum hydroxide, potassium sulfate, magnesium carbonate and calcium carbonate.

Filler in the ink on the one hand can play a role in adjusting the ink consistency, viscosity, viscosity, fluidity and yield value of the ink, on the other hand can play a role in adjusting the ink concentration, that is, when the ink concentration is large color depth, adding filler can achieve dilution.

Although the filler has an auxiliary role in the ink, its performance has many requirements that are consistent with the pigment, and it also affects the dryness in the ink based on oxidation polymerization and drying.

Fourth, the amount of additives in the ink can not be ignored

For printing operators, the printing suitability of the ink is good, and the lid can be put into use, which is of course the most convenient and convenient. However, due to the differences in the temperature and humidity of the printing environment, the characteristics of the substrate material and the different printing process conditions, such as the water content and PH value of the paper and the speed of the printing machine, the overprinting method, etc., although the ink varieties are diverse, the proportion of pigments, binders and fillers used in each ink is almost constant, and often can not meet the printability requirements of various conditions. Therefore, from the point of view of improving printing efficiency and quality, according to the changing printing conditions, the appropriate addition of some additives in the selected ink is beneficial to ensure normal printing.