The composition and function of ink: Water-based ink is processed from water-soluble resins, advanced pigments, solvents and additives. Its hue depends on the nature of the pigment. The thickness of the pigment requires a brilliant luster, robust tinting power and concealing power, superior resistance, and high dispersion. In order to obtain the superior printing suitability of ink, it is often necessary to use various ink additives to adjust the ink's kinematics, monotonicity and viscosity according to the situation. There are many factors in choosing the quality of ink and wash. Inappropriate use will bring a series of quality problems. When purchasing and using, pay attention to analysis, determine the shape of the buzzer, and adjust according to the situation to ensure its excellent printability .
In printing, ink has a certain viscosity, which is a prerequisite for the stalemate to transfer and transfer ink normally. Therefore, the thickness controls the viscosity of the high-grade ink to about 20 ± 5 seconds, and the difference in viscosity will cause the shades of the printed colors to be different. In the theoretical production process, the pH value of the ink on the machine can be adjusted or controlled between 8.0 and 9.5 according to the difference between the substrate and the temperature.
The distribution of ink and wash: The first assumption of ink distribution refers to the color and color of the ink. In the printing of packaging products, the colors used for ink and wash are mainly spot-colored flat-coating, which has the dual consequences of visual and anti-counterfeiting.
These inconsistent spot colors cannot be overprinted by cyan, magenta, yellow, and black. Often, the original ink cannot be directly used. They must be obtained by the disproportionate distribution of the original ink according to the production situation. .
The color distribution of the ink is based on the subtractive color principle, that is, any color can be mixed with the disproportion of the three primary colors, and consider the three basic attributes of hue, lightness and saturation. In color matching, the ink used should be selected according to the theoretical printing process, ink layer thickness, and printing substrate, and the factors such as hue, gloss, tinting power, and concealing power of the ink should be considered.