Printing quality will be affected by many factors, including printing equipment, printing technology, quality inspection, ink quality, etc. Among them, ink is the main raw material of printed products, and it is also the most important factor affecting printing quality.1. The performance of the ink itselfThe performance of the ink itself is the direct factor affecting the printing quality, and it is also the most important factor. Including dryness, color saturation, viscosity and other properties, will affect the printing quality.Dryness. The dryness of the ink refers to the drying speed of the ink. it has two requirements:The slower the ink dries on the printing plate, the better, and the faster it dries on the printing surface, the better. Fast drying on the printing plate will affect ink viscosity, rheology and uniformity of printing. Inks that dry slowly on the print can affect production speed or increase drying costs. It should be said that the ink that dries slowly on the printing plate and dries quickly on the printing material is the ideal drying performance. In addition, the dryness of domestic ink has a great influence on the quality of printed matter. Due to the incomplete drying of ink, printing defective products and waste products, and the dryness is greatly affected by seasons and climates cannot be ignored.Color saturation. The color saturation affects the color and texture of the packaging. If you want the packaging pattern and text to be more eye-catching, you need to increase the saturation of the ink. If the saturation of the ink itself is not enough, some packaging manufacturers will choose to increase the amount of ink in order to ensure the printing density. Doing so will easily cause ink accumulation, which will not only waste ink, but also cause dots to connect together, affecting product quality.viscosity. Viscosity is a property that prevents fluid flow. It is a measure of the ability of fluid molecules to interact to hinder the relative motion between molecules, that is, the resistance of fluid flow. The viscosity of the ink is related to the transfer of the ink during the printing process, which is related to the nature and structure of the paper. If the ink is too viscous, the ink transfer is not easy to be uniform during the printing process, and the phenomenon of roughening the paper occurs, causing the layout to bloom; if the viscosity is too small, the ink will It is easy to emulsify, get dirty, and affect product quality. Therefore, in the gravure production process, the viscosity of the ink must be strictly controlled to ensure the printing effect. The viscosity of the ink also affects the color difference value of the printed matter, and the hue of the printed matter can also be well controlled by controlling the color difference value.2. Ink concentrationIt can be said that the ink concentration is the coloring power of the ink, and it is one of the important indicators that affect the printing quality. The higher the ink concentration, the darker the printing hue, and the lower the ink concentration, the lighter the printing hue. The ink with high concentration consumes relatively less ink in printing, and the ink quality is better. In addition, the ink is thixotropic. Once the ink is stirred and rubbed, it becomes thinner. As the printing process progresses, the ink becomes thinner and the ink color of the printed product becomes lighter and lighter, resulting in lighter graphics and text. At this time, it should be added Appropriate original ink, this problem should be paid attention to when printing.3. Printing equipmentPrinting equipment will affect the effect of ink printing. If the color calibration of the printing machine is messy, and there are errors in color and positioning, it will affect the appearance of the printed product and affect the product grade. Therefore, it is recommended that factories choose high-quality printing equipment, update the equipment in time, and operate in a formal way to ensure that printing equipment and ink complement each other and provide guarantee for printing quality.