Printing ink urgently needs improvement

China is an ancient country with a long history and developed culture. Printing, papermaking, gunpowder, and compass are among the four most recognized inventions in the world. As one of the indispensable materials for printing, ink is undoubtedly invented by our great ancestors. According to legend, the earliest ink appeared in the Yellow Emperor (2597-2698 BC) years, and the more reliable ink inventors historically recorded were Wei's birthday during the period of Wei Jin (220-420).

Due to the limitations of ancient science and technology, the slow development of printing has led to an unusually slow improvement of ink. The greater development of the world ink began only around the 20th century. The successful synthesis of Lithol's red pigment in 1899 marks the arrival of the spring of the ink industry.

In recent decades, the development of ink has been extremely surprising. Due to the widespread adoption of new multifunctional synthetic resins and well-performing pigments, the printing quality and suitability of inks have been greatly improved, and the varieties have become more and more abundant. From the original single black ink to the development of various colors of the original color ink and special Color ink. The object that can be printed is no longer just paper, but has expanded to various carriers such as plastics, hoses, porcelain, and ironware. The role is not only to reproduce originals, present graphics but also have special functions. Such as magnetic ink, anti-counterfeiting ink, aromatic ink, temperature ink and so on. The ink industry has become an indispensable part of the national economy.

Ink concept

Ink is a homogeneous mixture of colored bodies (such as pigments, dyes, etc.), binders, fillers, and additives. It can be printed and dried on objects to be printed, with a paste of color and fluidity. body. Color, body bone (rheological properties such as thinness, hardness, elasticity, fluidity, etc.) and dryness are the three most basic properties of the ink.

Pigments are colored solid powders that are insoluble in water, oil, and binders. Together with the fillers, they form a solid component in the ink that is the color of the ink. At the same time, the quality of the ink is determined to a large extent. Such as: color, thin thick, viscosity, viscosity, printing properties. The basic requirements of inks for pigments are: bright colors, high concentrations, good dispersion and excellent physical and chemical properties.

The binder is an adhesive fluid that acts as a link to other components and is the fluid component of the ink. The rheological, printing and drying properties of the ink are all dependent on the binder. It is the basis for the quality of the ink.

The filler is a white transparent, translucent or opaque powdery substance that is also a solid part of the ink. Mainly play a filling role, not only reduce the cost but also adjust the ink properties, such as thick, fluidity, viscosity, etc., in order to improve the flexibility of formula design and improve the ink quality. The basic requirements of inks for fillers are: high whiteness, strong lipophilicity, easy dispersion, no harmful impurities, and even fine particles.

Additives are components other than the main components of the ink, and their purpose is to improve certain properties of the ink to meet certain special printing requirements. It can be either a binder, a filler, or an additional part of the finished ink. The amount of its use is generally less than 10%, mainly desiccant, anti-drying agent, remover, anti-friction agent and so on.