It is estimated that the total global packaging market (including printing, materials and processing) is about 395 billion US dollars, and is growing at a rate of nearly 6-10% annually. The latest figures show the share of various printing processes in the packaging field, of which lithographic printing accounts for 45%, flexographic printing accounts for 28%, gravure printing accounts for 20%, and other processes account for 7%.
Corrugated cardboard printing is the main market for flexographic printing today. In the field of carton printing, the flexographic printing process continues to grow, while other printing processes (such as offset or gravure printing) have declined significantly.
Corrugated cardboard printing accounts for 27% of global flexo printing, and folding carton printing is also shifting from lithography to flexo printing. Although the carton flexographic printing market is just emerging, the continuous maturity of flexo technology has improved printing quality and reduced printing costs. Flexo began to challenge traditional printing methods.
Basic elements that ink manufacturers must consider
Today, cartons printed using the flexo process are comparable in quality to other printing methods. With the global procurement of packagers and brand owners, the prices of flexo cartons are also declining. Therefore, printers must first consider the following factors:
· Ink technology: water-based ink or UV ink
· Flexible printing machine: linear arrangement or satellite
· Ink delivery method: pumping ink supply system, ink viscosity, cavity type ink supply system
· Features of anilox roller: laser engraved ceramic anilox roller, specifications of anilox roller recommended by the manufacturer, engraving angle
· Photosensitive resin plate: Thickness, installation, screening, expanded dots, screen angle for each color version of color flexo printing
· Printing materials
So, what are the specific standards in the development of printing inks for folding cartons?
Due to the continuous development of flexo printing technology, ink manufacturers must research creative solutions and propose innovative solutions to provide technical improvements to printers and processors. Printers are working to increase the speed of printing press conversion, reduce pre-press preparation time, use inks that meet environmental requirements, increase the speed of printing presses, and improve printing quality. The product must meet the requirements of the printer and meet user expectations:
· Attractive patterns and attractive colors
· Color consistency worldwide
· Comply with current regulations and standards
In order to meet the requirements of printers and carton users, ink manufacturers must study the following performance indicators and find the best compromise:
· Printing quality
· Paper feeding
· Fast drying speed on substrate surface
· Good fixation
· Scalability
· Wear resistance
· Good rewetting ability
·luster
· Network expansion
· Minimal foaming
· Easy to clean
· Reasonable price
Advantages of water-based ink
For water-based solutions for folding cartons, a new generation of water-based inks came into being. Due to the high solids content of the ink, water-based inks have many advantages:
· Reduced ink consumption
· Reduce ink waste
· Reduce the cost of processing ink waste liquid
In most cases, these new water-based inks are manufactured without any volatile organic compounds and are environmentally friendly. When using UV-curable inks, odors are generated, while water-based inks are odorless. Therefore, the prospect of water-based flexo ink is very promising.
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