Most popular for flexo labels to choose the approp

2022-07-28
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Select appropriate flexographic technology for flexographic labels

release date: Source: keyin editor in charge: litchi number of Views: 601 copyright and disclaimer

core tip: as the most important part of the product image, the requirements for the "appearance" of the label are becoming higher and higher. In the sunny days, the requirements for environmental protection of labels are becoming higher and higher. Using environmental friendly flexo printing to produce high-value labels is an important direction for label development in the future. In all areas of flexographic applications, label printing requires much higher quality than other flexographic applications. The choice of printing plate is different under different printing needs

[China Packaging News] as the most important part of product image, the requirements for label appearance are becoming higher and higher. In the sunny days, the requirements for environmental protection of labels are becoming higher and higher. Using environmental friendly flexo printing to produce high-value labels is an important direction for label development in the future. In all flexo applications, even in affordable 3D printers, label printing requires much higher quality than other flexo applications. The choice of printing plate is different under different printing needs

different printing materials lead to different printing plate choices.

for hanging label printing with paper as the main printing material, customers may not be most concerned about the spot part of the printed product, but have high requirements for the field. Therefore, plates with medium or low hardness and good ink transfer rate will be more suitable for this kind of use. However, this transformation was made possible by the Ramses (implementation and demonstration of advanced material solutions that can continue high-efficiency ships) project funded by the European Union in june2017 by 37 partners from 13 countries

for film label printing, the gradient of highlight and the reproduction of fine dots are more concerned. Therefore, printing plates with high hardness, high resolution and capable of carrying fine dots are often welcomed by printing enterprises

different inks lead to different printing plate choices.

for different products, in addition to the widely used UV inks, the use of ink is also gradually expanding in the printing fields of food and medicine. Different flexographic plates may have completely different printing performance under different ink systems due to their different printing characteristics

therefore, when considering flexographic printing, printing enterprises should first fully understand the conditions of customers and themselves, and then they can see the essence and easily deal with problems. At the same time, in response to these needs, flexographic plate suppliers are also actively developing a large number of flexographic plates for different printing needs. According to different plate materials and production methods, these plates are divided into solid photosensitive resin solvent plates, water washed plates, thermal plates, rubber direct engraving plates, etc

choose different flexographic materials according to the different properties of the plate

first of all, the printing quality of the plate is what we pay most attention to, including the carrying capacity of high light spots (plate resolution), the reduction performance of small text lines, the reproduction ability of anti white text and lines, the degree of point expansion, the reduction of intermediate tones, the ability of on-site ink transfer, and the on-site printing performance. Among them, the resolution of the printing plate will directly affect the reproduction of high-precision images by the printing plate. For example, for the high-definition flexo printing technology that has been widely promoted in recent years, a durable and reliable printing plate with a minimum point of less than 12 microns must be selected to meet the printing needs of high-end labels such as daily chemical products. Of course, the plate making process itself also needs more accurate control

secondly, the comprehensive printability of the printing plate in the printing process must also be considered, involving the compatibility of the printing plate with rough surface materials, the compatibility with different UV inks and water inks, the durability of the printing plate and the stability of repeated use, which will greatly affect the smooth progress of production. For example, in label printing, many printing houses have experienced a phenomenon that the printing plate shows poor ink transfer at the beginning of the printing machine startup, and the printing effect is gradually normal after 1000~2000m of printing. Apart from other factors in the printing environment, in terms of printing plates, this kind of phenomenon is often related to poor plate washing and drying

when the plate washing solvent is out of balance, that is, the proportion of each component of the plate washing solvent is out of balance, the plate washing solvent has a great impact on the surface performance of the plate, resulting in the printing plate is not ink friendly and the ink transfer is poor. Of course, if the plate washing equipment cannot remove the residual solvent from the plate surface and the drying is insufficient, this problem will also be caused. But if we can choose a kind of printing plate which is insensitive to the change of solvent and can be dried quickly, this kind of problem will be solved

through the brief analysis of the above plate making technology and plate material evaluation methods, we hope to help label users select appropriate products according to the characteristics of enterprise equipment and products through objective, scientific and fair evaluation methods, so as to achieve double harvest in technology and benefits

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