The printing process in packaging color box is particularly important, there are often various problems in printing, so packaging color box will appear in black shadow printing, how to solve it? First of all, we need pay attention to avoid the design prone to produce ink lack of black shadow, such as large bezel, large field, etc. If such a design must be used, the following measures can be taken:
1. Use as many pictures as possible in the design of the packaging color box. For the online eye adjustment and printing that does not involve the field, it usually does not produce a black shadow phenomenon.
2. Place color bars on the cutting section outside the graphic section to transfer the excess ink, which are called ink shift bars.
3. Adjust the packaging color box printing press to increase the ink supply of black shadow.And some printing presses are equipped with inclined uniform ink roller, which can effectively solve the black shadow, that is, using different parts of the ink roll to print different parts of the field, so that the ink roll will not lack of ink.
4. Change the design of the packaging color box.Reduce the density of large bezels or large field, balance the density gap between the page online video image and the field part, and try to balance the ink volume of the whole page to reduce the appearance of black shadow.For example, if you have two pictures placed on the right side of the print, the color box is easier to produce black shadow; change the design, place the two pictures separately, one left and right to balance the ink amount of the whole version, the rabbit black shadow can be avoided.
5. When designing the packaging color box, design the layout reasonably.Proper layout can ensure enough ink roll time to avoid black shadow.For example, if a design is to place a large picture in the field, if the print frame is large enough, it can be placed behind two images on a white background.