Almost all color printing has a certain amount of digital printing for printing color difference, and the printing color difference of offset printing corrugated packaging is more prominent. This is not to say that the printing of offset corrugated packaging is more prone to color than other printing methods, but because the products of offset corrugated packaging are sub-packages, which are both small and outer packaging, both packaged and individually packaged. So Founder , he belongs to the real high-end packaging. Since it is a high-end packaging, people's requirements for it naturally have to reach the highest standard. We often see a lot of watermark products packaged together, there will be obvious printing chromatic aberration, and people seem to turn a blind eye, but the color difference of offset corrugated packaging products is very sensitive. This is the hope and demand given to people by high-end packaging. design
We all know that the main reason for the high-end color printing color printing are due to take place due to net point, because separation, caused by all other means printing color are relatively easy to solve. For example, the color hue deviation can be solved by adjusting the ink ratio. The overall color cast color can be improved by adjusting the thickness of the ink layer of a certain color. The overall color of the dot caused by the excessive pressure is too dark, as long as the pressure is reduced. That can be solved. It is difficult to solve the activity with a color cast, which is local color cast. Usually we will find that there is a region or main pattern with a color cast. This is not a problem that can be solved simply by press adjustment or ink adjustment. At this time, the printing supervisors of many enterprises will solve the problem by adjusting the printing dots of a corresponding color. This kind of solution can generally solve the problem, and only this method can solve the problem. Therefore, the big family Guanhua , it is an effective solution. However, there is a problem we can not avoid, that is, it has failed to solve the problem can be avoided, and that this issue must be able to identify problems in the press box paste printing of the official time, so, this time to solve the problem anyway The result will cause a relatively large loss to the enterprise, because you have to stop to solve it, and the long-term downtime will be a big loss no matter how long. device
The main reason for this local chromatic aberration is that due to the Beiren shares , the printing plate of a certain color is caused by the soft or hard contrast in the process of sensitization and development. It has been known before printing that if the printing plate is in the process of sensitization, if the sensitization time is too long or the brightness of the lamp is increased, the dot of the shallow net will disappear, and conversely, the density of the shallow mesh dots will increase. This phenomenon has resulted in a very unstable printing plate. This unstable result is a flexo that can't be adjusted anyway on the printing machine. It can only be stopped and disassembled, adjust the film outlets, re-print the plate, then press the machine, and then try to print the packaging materials . It’s gone. Although many companies currently use CTP , similar problems can occur. Although most CTPs are sensitive, similar instability can occur. This kind of instability will inevitably lead to unstable dot density of the printing plate, and the unstable dot density of the printing plate will inevitably lead to partial color deviation packaging design every time printing, so to effectively solve this problem It must be ensured that the dot density of the printing plate is acceptable. Web publishing
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