For packaging and printing, the advantages of applying CTP technology mainly include the following aspects.
1. Reduce the cost of plate making
At present, the prices of high-quality thermal CTP plate materials of some brands (such as Kodak, Fuji, etc.) are generally about 35 yuan / square meter, which is slightly higher than the price of the ordinary PS version, but much lower than the UV printing special PS version. At present, most of the printing of high-end packaging cartons and cigarette packs uses UV printing, and the ordinary PS version is basically not used. Therefore, after applying the CTP technology, the price of the plate material does not increase but decreases. Moreover, CTP plate-making saves the film output process and saves the film cost, so it has more price advantage.
2. Improve plate making speed and plate making quality
Unlike newspapers (the contents of which are different every day), the product packaging is generally not easily changed after finalization. There is a stable period, and the film required for ordinary plate making can be reused during this stable period. Although CTP plate making saves film output Process, but it is difficult to match in this regard. However, CTP technology has indeed improved the speed and quality of plate making to a certain extent, mainly reflected in the following aspects.
(1) Avoid the errors caused by the changes in the image processor's accuracy, film exposure, developer and fixer concentration during film output.
(2) In the ordinary plate making process, the film and the plate material are not tightly attached due to insufficient vacuuming of the plate-making machine, which leads to the phenomenon of virtual printing plate network cable; avoiding the underexposure caused by the aging and yellowing of the film. The problem of film edge marks on the printing plate; avoiding the problem of dirty plates caused by the dirty glass of the printing machine or the dirty surface of the film.
(3) Reduce the time and chance of making mistakes in manually selecting the required film, manually measuring the placement of the film on the printing plate, and manually trimming the dirty spots and film edges on the printing plate during the ordinary plate-making process Marked time.
3. Improve printing speed and printing quality
Due to the precise positioning of CTP plate making, there is basically no need to adjust the CTP printing plate after it is put on the machine, which greatly improves the speed of plate matching and saves paper for plate matching. Moreover, the CTP printing plate is overprinted accurately, the surface of the printing plate is clean and free of dirty spots, the dots of the printing plate body are restored well, the layout is good in ink affinity, the printing durability is high, and the printing quality is naturally improved.
4. Ensure the registration accuracy between each process
The process of packaging and printing is often complicated, generally requires 3 to 5 processes, and the production cycle is relatively long. Because the paper has intractable shrinkage, the size of the paper will inevitably change during the period. In addition, the requirements for printing accuracy of packaging printed products are relatively high, especially for high-end packaging cartons (especially those used in automatic packaging machines). The requirements for pattern symmetry and dimensional stability are relatively high (error is ± 0.5mm Inside). For this reason, we often need to adjust the printing plate according to the size change of each batch of paper to offset the registration deviation caused by paper expansion and contraction. With the CTP, this adjustment becomes convenient and fast, which effectively guarantees Registration accuracy between processes, as well as pattern symmetry and dimensional stability of the printed matter.
5. To ensure the timeliness of proofing and design proofing of cigarette packs
Although the live source of cigarette pack printing is stable, affected by tobacco policy and the international environment, from the history of the past decade, the tobacco industry will have one or two industry-wide "revision movements" every year. In order to maintain the original market share and "open up the territory", they are making every effort to develop new products, and in order to get more "cakes", cigarette pack printing companies are also actively catering to China Tobacco Company, so that Make every effort to design and develop cigarette packs. Whether it is a revised proofing of an old cigarette pack or a design proofing of a new cigarette pack, according to convention, China Tobacco Company wants a finished product sample. In this period of "more monks and less porridge", the samples can be delivered quickly to "eat" Can not delay the delivery time of the existing products, this time highlights the advantages of the clean and tidy platemaking workshop CTP technology.
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