For those who have just engaged in the printing industry, it is certainly not clear that this is suitable for spot color printing. If we print a large area of ​​light-colored uniform color blocks, we usually use the original ink to add, because in this way, the light-medium agent is used to prepare spot-color ink and then print in the field, so that the ink layer is thicker and easier to obtain uniform color and achieve a thick effect. However, if you choose to use a four-color printing process, you must use low-quality flat screen dots. Second, low-level flat-screen outlets tend to be slightly smaller due to slight sand particles or slight exhaustion during printing, because paper powder accumulates on plates and blankets, and paper has low smoothness. The poor ink transfer caused by the small outlets resulted in uneven ink. At this time, the printing was easily over-watered due to the layout.
In addition, Xiao Bian warmly reminded here that if it is for a large area of ​​dark color, the use of four-color printing process, then need to be composed of several colors of high salty network overlay, the ink layer is too thick and prone to back stain; The use of spot color printing process only need to print a color, not easy to appear dirty back. With the spot color printing process, only one color is printed on the corresponding part to avoid the possibility of overprinting errors. For example, with the four-color printing process, some parts of the graphic text may be synthesized by several colors.