How to deal with the matching problem between ink

How to deal with the matching problem between ink and paper

when printers order ink from suppliers, it is best to submit a sample of the substrate materials they want to use. Ink manufacturers can prepare products that can obtain the best results according to the surface characteristics of the samples to be printed

ink manufacturers can analyze the precise composition of the surface of the submitted samples, and can determine that the ink with complex components provided by them can adhere well to the surface to be printed, especially for the coated surface. Because the ink analysis technology is very advanced at present, the utilization and development results of the numerical simulation technology of the analyzed injection molding process and the mechanical properties of plastic parts are also more accurate. This phenomenon is due to the increasing interest of researchers in the ink and paper industry in the ink/paper interaction

at the 1996 taga annual meeting, two papers were presented. One was about how paper coating affects the interaction between paper and ink in the offset printing process; Another article discusses the same problem for publishing gravure water-based inks. In the first paper, it is considered that among the surface properties of coated paper, smoothness, porosity and absorption are important factors that affect the printing performance, especially the ink splitting mechanism. It was found that these properties affected the flow performance and tack buildup of the ink over time

the importance of understanding this phenomenon

because the effect of the final product will be affected by the structure of the coating layer and its chemical properties. Printers need to understand and explain this phenomenon to customers. Although highly coated paper may provide improved printing performance and the ability to accept and restore images, there is a loss in optical characteristics, especially in gloss

among these variables, the chemical properties of the paper coating are related to its binder, dispersed particles, and filler grades such as clay. For these variables, the adhesive level is the most critical, because it has the greatest impact on the certainty of ink adhesion between users and manufacturers. The increase of adhesive composition reduces the porosity of the surface, which will limit the capillary effect of ink in the paper

if the ink manufacturer can test the paper used, they can develop the corresponding ink formula to optimize the printing performance and optical performance of the paper

the problem of using water-based inks

the second paper discusses how the printing performance is affected when publishing gravure printing personnel use water-based inks to replace traditional solvent based inks. There are many benefits, including low levels of hazardous air pollution (HAP) and volatile organic compounds (VOC). This ink also reduces printing machine management and insurance costs, and reduces the risk of fire and explosion

however, in the future, the Aluminization rate of water in car bodies, four door covers, bumpers, crash beams, heat exchange systems, chassis systems, power battery boxes, and electromechanical shell parts is bound to increase significantly. The development of base ink is very slow, partly because it has different chemical characteristics from solvent based ink. If the water in the ink expands in the material fibers, the printing quality will also be affected, Produce ink gloss reduction and tone point deformation. The drying problem of using water-based ink is more critical than that of solvent ink, because if the ink is not dried well, it will cause the transfer of ink to the closed roller and cause the deformation of the image

paper surface properties, such as smoothness, moisture absorption, fastness and surface tension, have a great impact on the smoothness of printed matter. Even small white spots and flaws on the surface of the paper may cause point deformation. The comprehensive problem of using water-based ink is the wrinkle phenomenon and ripple phenomenon

in the second paper, it was also found that the internal size change of non coated paper enhanced the printing properties and printing quality of water-based ink, and the printing quality changed with the increase of size change. The effect of fiber expansion can be minimized by making the paper hydrophobic, but the printing quality may deteriorate rapidly

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