A scientific method to effectively solve the start-up loss rate of offset packaging printing

Offset packaging printing is the most flexible and most convenient printing method, but there is also a very sensitive problem, that is, the problem of startup loss rate, because offset packaging printing will cause a high loss rate every time you start. Offset printing plate each time on the machine need a color, color correction process, this process is usually a loss of hundreds of paper is normal. This boot loss is not only a waste of paper, the biggest loss is the loss of effective printing boot time. Because every hour less printing of the printing press is tens of thousands of sheets, equivalent to the printing volume of 20,000 products. Especially at present, with the market of offset preprinting mode, how to effectively control the startup loss rate is a management problem and technical problem worthy of attention.

The reason why the opening rate of offset printing is the most likely to cause large losses, the main influencing factor is that the color expression of offset printing is basically a overlapping color performance, generally 4-5 colors stacked together, no matter which color error occurs, the entire color system will change. Therefore, when offset printing, there is a lot of uncertainty in the process of starting the color correction. Some color color difference may be due to the chroma difference of a color caused by the full plate color difference, it may also be due to a color or even multiple color printing plate dot inaccurate caused by local color difference. In short, as long as there is a little visible color difference, you will not dare to officially print in batches, because you may print out the batch of scrap, such a loss is a very fatal loss.

There is also one of the most common and most prominent boot loss phenomenon, in addition to the waste of paper, there is an effective probability of being wasted, which is also a huge waste, because he is a waste of production and processing costs. Moreover, this waste is difficult to solve in a short time, even if it is barely solved, it is difficult to achieve satisfactory results.

So how to ensure that the boot loss rate is minimal? There are three key points: the first point is to ensure the accuracy of the printing point before press. This step is mainly reflected in the accuracy of the dot density at the time of publication of the printed document, and is also the most important key step in the entire process. Many companies are not willing to pay for the cost of pre-press graphic designers, and the loss may be hundreds of times the investment. The second step is to publish, publishing seems very simple, but the start-up loss rate is due to the inaccurate reduction of the print version dot density at the time of publication. Therefore, to control the qualified rate of publishing, that is, to control the printing start-up loss rate. Third, don't wait for the opportunity to repeat the test print only to find that the printed version needs to be reprinted. This shows that your experience and expertise are poor, and any damage should be controlled before and not after. When you find out in the production process, the loss must have already been caused. While you have the power to fix the problem afterwards, you don't have the power to prevent the loss. This is a management principle that many managers do not understand.
If you really want to effectively avoid the boot loss rate, then the most effective way is to do full master work before printing. First of all, the plane personnel should strictly compare the documents on the publishing machine with the samples provided by the customer, and timely find and deal with the unqualified dot density. The next step is to compare the dot density of each monochrome version with the density of the printed document. Now the color processing software can display the data directly, as long as we extract the data, we can make an intuitive comparison. Of course, the extraction of data also requires equipment and skills, such as the color data of the sample box can be extracted by scanning color separation. The monochrome dot density of the printed version can also be extracted by a professional scanner, as long as there is data, what results we can get in advance. In this way, we can do the work before production and eliminate the loss in the preparation stage.