The problem of package printing nesting has always been a very important technology in the industry. In most cases, the surface copy printing of color box and plastic box has various colors. If each color is understood as the completion of one-time printing, then, if a product picture, red, yellow, grass, green, green, red, red and purple So many colors are achieved by many times of cooperation within the printing machine when the printed articles pass through the transmission device of the printing machine. Here is just a metaphor, the actual operation will be much more complicated.

In the printing of some paper products, because the characteristics of the material will be quite simple. For PET plastic box, there will be a white socket in most cases. Because PET plastic box film is transparent, the cover of single-layer ink is often a translucent transparency, and the printing of paper box is completely opaque paper, do not consider this problem. In order to achieve the printing effect of the carton, the method adopted is to lay a layer of white background ink on the bottom of the pattern, so as to achieve the target effect.

This kind of overlay printing will involve a register problem. When the back color can't be printed on the white ink accurately, there will be exposed white or other printing quality problems. In the actual operation, there is a specific condition for the appearance of this kind of whiteness. Most of the cases are that the font or line of the copy is very small, and the position deviation of the hair will produce very serious quality problems. When this happens to pet plastic box, the way of Shenzhen plastic box factory is to cancel the bottom white layer and directly print the target documents, so as to avoid this problem.