What's the matter with ink-dragging in printing? Today, the printer will tell us what is ink-dragging in printing. Before that, we will talk about printing. Printing is the technology of transferring ink to the surface of paper, textiles, leather and other materials through plate-making, ink-applying and pressure-pressing processes, and mass-copying the content of the original manuscript.
In a simple sense, printing is a process of transferring the graphic information from the original manuscript to the printer by plate or other means. It can also be understood as a reproduction process of transferring the colorant/pigment (such as ink) to the printer by using analog or digital image carriers. This is the explanation of printing, but there may be ink-dragging phenomenon in the printing process, so what about ink-dragging? Following is a brief introduction of how the ink towing process can be returned to printing. For example, ink stacking: ink or other substances deposited on ink rollers or rubber cloth, forming relief deposits, affecting ink and print transfer. Deinking: The phenomenon that metal ink rollers are oxidized by wetting solution and repel ink.
Duplicate Shadows: Double contours of dots, lines or words of the same color on printed matter. Back sticky: Printing ink printed on the substrate, sticking to the back of another sheet, causing dirty rubbing. X-ray printing: The pictures and texts printed on paper can be seen on the back and so on. These are some of the problems that are easy to occur. So, what is the matter of ink-dragging in printing? When we use ethyl acetate as the diluent of the adhesive, ethyl acetate is a good solvent for common chlorinated polypropylene ink and polyester ink. The ink part may be similar to the color biting fault in printing. When the working concentration of the glue is too low (the proportion of ethyl billion), the dissolution of the ink by ethyl acetate is more severe during the gluing process. The viscosity is related to the splitting and transferring of the glue. The greater the viscosity of the glue, the easier the ink-dragging phenomenon will occur. If the speed is slow, the gel will soak the ink layer for a long time, which will easily lead to ink-drawing phenomenon.
This is especially important when gluing the printing film containing transparent ink. When the pressure of the top roller is too high or the local pressure caused by the shaking of the top roller is too high, the ink will be firmly attached to the screen roller, resulting in ink dragging failure. When the surface of COTS is rough and not smooth, it is often necessary to increase the pressure of cots in order to avoid uneven gluing. Ink adhesion is very poor, ink layer may be partially pulled down by the whole block, and ink will be attached to the glue tray, resulting in glue turbidity, dirty. The contact point of ink mesh roller dot edge is more concentrated by pressure, but also by some stretching displacement force. If the adhesion and wear resistance of ink is poor, the ink will be dragged.