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Ink For Self-adhesive Sticker Printing

(II) Ink for label printing
With the development of the economy, the widespread use of self-adhesive stickers in commodities has driven the rapid development of the label printing industry. But people's understanding of label printing inks is far less than that of label materials, printing methods, etc. Label printing inks, as a mysterious field, urgently need us to recognize and explore.
There are many types of label printing inks. According to the different solvents used, they can be divided into three categories-water-based label printing inks, solvent-based label printing inks and UV label printing inks.
(Three) the use of multi-process combination of label printing
At present, domestic label printing mainly uses letterpress printing, offset printing, flexographic printing, and screen printing. From a technical point of view, these printing methods have their advantages and disadvantages, and no printing method can replace other A printing method.
Offset printing is a widely used printing method. Domestic sheetfed printing is basically the world of offset printing. This printing method is fast, has high printing clarity, accurate overprinting, and full printing levels. Light, not suitable for printing brightly colored label products.
Letterpress reproduction of graphics has good sharpness, high printing speed, stronger color strength and durability than offset printing, and is slightly worse than screen printing, but the level reflection and registration are stronger than screen printing and flexo printing. Most of them use letterpress printing for label production.
The biggest advantages of screen printing are the thick ink layer and good hiding power, but the speed is slow, the layers are poorly reflected, and the registration is low (this refers to the general level in China. The accuracy has reached 10 silks, and the speed reaches 6000 prints per hour), so the screen printing machine can be used to print labels with weak gradation.
The characteristics of flexographic printing are relatively centered. Most foreign countries use this method to print labels, but this technology requires high levels of anilox roller processing and workers. Although the machine is relatively simple, the process is quite complicated. Not many domestic use of this method to print labels.
In order to print the most exquisite labels, it is necessary to effectively combine various processes in the printing process, integrate the advantages of various printing methods, and form a greater combination of advantages.
The purpose of combining multiple processes:
(1) Effective anti-counterfeiting effect: using multiple process effects to print on the same label product, especially on some easy-to-fake cosmetics and food packaging labels, this printing method can allow consumers to see the label at a glance Seeing the authenticity of the product guarantees the interests of product manufacturers and consumers and has earned an excellent reputation for the printing house.
(2) Improving the quality of printed matter: The combination of multiple processes is a combination of the advantages of various printing processes, so this combined printing method can ensure the printing effect of printed matter to the greatest extent, thereby meeting people's increasing sensory requirements, and Improving the printing quality of printing plants, thus bringing more live sources to them. Improve production efficiency and reduce costs. The combination of multiple processes also includes the combination of printing and post-printing processes. Printing and post-printing can be completed at one time in product production, and the finished product can be directly produced, which can greatly reduce costs.
Multi-process combined machines come in the following two forms:
(1) One is a single machine combination: In the trademark printing press, we are more commonly a slant-back type machine, which can complete printing, bronzing, die cutting, waste disposal and other functions on one machine, but because it is a single machine printing The print size will be affected.
(2) The other is to combine the units into a production line: it is a production line that combines printing and post-processing processing such as embossing, screen printing, flexo printing, bronzing, die cutting and other processing units to perform printing production, achieving multiple processes on the same product Combined effect. This combined printing production method meets the needs of the development of the label market, and the grade of printed matter has been greatly improved. At the same time, it has also brought huge profits for printing manufacturers.