Using a UV flexo printing process allows printers to print premium labels at a lower cost. As a pioneer of UV flexo printing technology, the German company Azuma laid the foundation for the transition from conventional flexo printing to UV flexo printing.
The flexo printing machine has a simple structure and is easy to carry out sequential processing on the printed products, which is very attractive to users. The difficulty lies in the fact that the printing process is not easy to control, which mainly depends on the technical level of the printing press operators.
Flexo platemaking has been a long time since there are many other factors involved in the printing process. Only experienced professionals can solve these problems. In addition, the market has also put forward higher requirements for improving the quality, because the standardization of flexo printing needs to be achieved in order to obtain a stable quality printing effect and promote the development of UV flexo printing technology. Asumah has been a leader in this area for 12 years. Through close cooperation with customers, Asuma has made great progress in UV flexo printing technology. Today, UV flexo technology is increasingly used to print business forms, product packaging, and various labels.
At present, printing companies are very interested in flexographic technology, but when they invest in new equipment, they are indecisive, and they do not know what kind of equipment they should purchase. In addition, some articles in professional journals often discuss non-repeatable printing effects and make customers feel at a loss. In fact, the above articles have their omissions. For example, when discussing the problem of increasing tonal values, there is no explanation on how to measure the hue increase. Large value, on which printing surface, and the tone values ​​mentioned in the article have actually been modified.
UV flexographic printing technology is moving in the direction of multi-function, but the ever-changing, UV flexographic printing technology is still the embossing technology, this point has not changed.
Although flexo printing in some ways has the same features as offset printing and rotogravure, it does not replace offset and rotogravure.
Using flexo technology can produce high-quality labels at a lower cost. It is now possible to ensure that the turndown preparation time is shortened and satisfactory printing results are achieved. However, there are several principles that must be considered and strictly adhered to, the most critical of which is the development of standards. The following factors will affect flexo printing production:
Separation: The printer has its own standard media: Producers have different table structures: Each company has different standards. Substrates: Product Standards Anilox: Product Standards Printing Ink: No uniform standard, decided by the supplier Coloring: No uniform color separation In this regard, every printer must establish its own standards, otherwise it will be difficult to achieve success. In general, the screen angle should be close to offset printing.
In order to obtain the desired printing effect, some preparations should be made. To determine the dot gain for each ink, separate plates, mounting tapes, substrates, and appropriate ink rollers should be used for testing. Even if there is a change in industry after the above parameters, the dot gain value must be re-measured.
Plates should use suitable mountings.
The above measures are very important and the customer must carry out the test himself. As for other aspects, it is only necessary to use the current data provided by the equipment manufacturers.
The higher number of anilox printing lines requires special requirements for the anilox roller. The smaller the dot, the smaller the ink hole on the anilox roller. The tiny dots should not be caught in the anilox roller, but they should be supported by the mould to avoid tiny spots. For example, a 60-thread printing plate should be equipped with a 400-mesh anilox roller; a 54-thread printing plate should be equipped with a 300-mesh graining roller.
The cost of the anilox roller is getting higher and higher, and it must be ensured that the grid will not be damaged. The precision of the grid processing is seriously negotiated with the manufacturer. In addition, the ink hole switch can determine the amount of ink transferred. It should be known that the ink in the ink hole is only About 25% is transferred to the substrate.
Ink inks currently have no uniform standard for flexo inks, which means that each printer must establish a flexographic ink standard with suppliers. In addition, there are significant differences in the transmission of ink from the plate.
The substrate plays a very important role in determining the transport status of the ink. The rougher the substrate, the thicker the ink film that needs to be transported. In general, the printing effect depends on the quality of the ink, the drying process, and the operating speed of the device.
Conclusion UV flexo technology has many advantages, and constantly improving and improving it will have greater appeal to users. At the same time, it is not difficult to see that all the above aspects must be given adequate attention. Therefore, the selection of a suitable partner has a pivotal role.