Select the appropriate flexographic technology for

2022-05-27
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Choose the appropriate flexographic technology for flexographic labels

release date: Source: Creative printing editor: litchi browsing times: 911 copyright and disclaimer

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

different printing materials lead to different printing plate choices.

for tag printing with paper as the main printing material, customers may not be most concerned about the point part of the printed matter, but have high requirements for the field. Therefore, plates with medium or low hardness and good ink transfer rate will be more widely used by such users

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

different inks make different choices for printing plates

for different products, in addition to the widely used UV inks, the use of ink is also gradually expanding in the printing fields such as 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 exit the test state at the same time when encountering problems, so as to see the essence and deal with it easily. At the same time, in response to these needs, flexographic plate suppliers also actively develop a large number of flexographic plates for different printing needs. According to the different materials and production methods of these plates, they are divided into solid photosensitive resin solvent plate, water washing plate, thermal plate, rubber direct engraving plate, 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 bearing capacity of high light spots (printing plate resolution), small text lines. In cooperation with Beijing Iron and Steel Research Institute, we have developed the reduction performance of electronic change meter, the reproduction ability of anti white text and lines, the degree of point expansion, the reduction of intermediate tone and the ability of on-site ink transfer, Factors such as the printing performance of the field. 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 flexographic printing technology popularized more in recent years, the printing plate whose minimum point can stably reach less than 12 microns must be selected to meet the printing needs of high-end labels such as daily chemicals. 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, including 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 we can feel from repeated use, which will greatly affect the smooth progress of production. For example, in label printing, a phenomenon has appeared in many printing plants. The printing plate shows the problem of poor ink transfer in the early stage of printing machine startup, and the printing effect is gradually normal after 1000 ~ 2000m 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, this problem will also be caused if the plate washing equipment cannot remove the residual solvent on the plate surface and the drying is insufficient. However, if we can choose a printing plate that 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 harvests in technology and benefits

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