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, viscosity differences, 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 pigments in ink pigments include pigments and dyes. Colors used in printing inks are usually pigments, but also some dyes, which are very fine particles of color. Pigments are generally insoluble in water, and do not dissolve in the binder, and are partially suspended in solution, and the dye is generally soluble in the binder. Pigments have a great influence on the ink. The relative density, transparency, heat resistance, light resistance, and resistance to chemicals are all related to the 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 flute and other physical properties; its use is to a certain extent Affecting the drying of the ink, the oxidative polymerization drying ink is particularly prominent. In addition, the durability of the ink in all aspects is also determined by the pigment. Therefore, due to different types of inks and different uses, the pigments are also different, which requires the selection of suitable inks according to the product use and process characteristics during printing. For example, high-speed multicolor printing presses should be used to select bright and fast inks. Solid, wear-resistant inks to ensure print quality.
Second, the role of the link material in the ink The link material is a kind of fluid with a certain viscosity, viscosity, its role is multi-faceted. As a carrier for pigments, solid particles such as powdery pigments are mixed and connected so that the pigments that adhere to each other can finally adhere to the intaglio. 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 preparation or production process is not suitable, the ink will not only lack vivid colors and good luster after printing, but it will also cause chain quality defects such as pasting, blemishes, overprinting, pulling of paper, and no ink, which will bring about normal printing. Certain obstacles. Therefore, the binder is a factor that affects the quality of the ink. (Putian County, Fujian Province, printing factory Kang Qilai) ("Guangdong packaging")