What we can see is the combination of the existing paper bag machine and printing machine. Under such circumstances, the paper bags that can be produced are very beautiful. At the same time, it is able to meet our market demand.

        For market use, it is possible to add a third primary color on the basis of the pure color of the two primary colors. After such use, it is necessary to find that the chroma of the printed color will be lowered. Let the brightness of the product be reduced accordingly, and we should basically keep the hue of the printing color unchanged, and at the same time make the paper bag machine close to the color printed by black plus a certain amount of color. At the same time, in color printing, we will often use this feature to reduce the amount of color ink, which is called background color removal (UCR) and gray component replacement (GCR). To be able to see that the product is in the four-color printing technology, we will focus on the color of the picture as the most important issue. We must be able to know that there is a line of blue characters on the yellow base plate, so we will let the On the yellow version of the film, if you see the blue word, it must be empty. And the color of the paper bag on the paper bag machine becomes black and the position should not be hollowed out. Therefore, relatively speaking, because black can suppress any color, it is easy to see if the black content is hollowed out. So only let the product be combined. Only then can we occupy the market well.