Market changes and industry transformation have also presented new challenges to label printing process technology. In China, the printing process of labels is very complicated, flexo printing, screen printing, Offset , embossing, and gravure printing of five traditional printing techniques, along with various The technological advancement of printing technology itself, as well as changes in market demand, are constantly changing in the field of label printing. However, due to the advantages and disadvantages of each printing process, how to pass the market in the current market, where the pace of development is slowing down, competition is becoming increasingly fierce, profits are getting lower, quality requirements are increasing, and processes are becoming more complex. The selection and configuration of printing equipment to properly grasp the cost, efficiency and quality has become one of the focuses of the label printing industry. The following will introduce a new idea: unit-type offset printing + unit-type flexo printing, in order to achieve both long and short, quality, cost, efficiency and complementary advantages.
Technical advantages of intermittent rotary offset printing
Before the introduction of the intermittent PS version of the self-adhesive rotary press, China's self-adhesive label printing mainly relied on resin embossing and flexo printing. Now the five printing processes have a very wide range of applications, especially intermittent PS. The offset printing press is the offset printing of the main model. In recent years, it has developed extremely rapidly. Many self-adhesive labels in daily chemical, wine, electronics, medicine, food, chemical and many other fields have turned to intermittent rotary offset printing. The reason, from the offset itself, is the following.
1. The plate making is very convenient, the printing plate cost is extremely low, and it has been widely used. CTP digital technology makes plate making more convenient and fast, and the plate making degree is high. Printing network point clear, print quality and stability improvement;
2. There are few proofing inputs, and the success rate is high. Especially for orders with dot-gradients, it is often only one proof to be successful. The highest can be passed twice, while the resin letterpress is difficult to achieve one-time success. , proofing, causing a large loss;
3. The printing start-up cost is low and there is no need to replace the printing cylinder.
The intermittent PS version of the self-adhesive rotary press brings the following new advantages.
1. The equipment investment is small, the effect is quick, and the financing pressure of the enterprise is small;
2. Can be combined with a variety of processes, such as: front screen printing (low frame cost), front cold ironing, die cutting, glazing, rubber surface printing, automatic detection, etc., reduce labor, reduce wear and save time;
3. High degree of automation, reducing the technical level of dependence on the operator.
The use of intermittent PS version of the self-adhesive rotary press can not only reduce the production cost by 30% to 70%, but also easily produce high value-added differentiated products and help printing companies get more orders.
All in all, the intermittent PS version of the self-adhesive rotary press is more flexible, and the investment pressure of the enterprise is small and the running cost is low.
Table 1 is a five-color drug label of 5cm × 12cm, taking the cost comparison of the intermittent resin letterpress self-adhesive rotary printing machine and the intermittent PS version of the self-adhesive rotary printing machine with 300,000 pieces. 1.5mm, the label spacing is 3mm, 4 consecutive versions, 4 vertical 4, 21.8cm wide material.
Intermittent offset printing is more suitable for short orders, which better caters to the trend of more and more personalized products in the label market and smaller and smaller orders for single products.
Technical advantages of unit-type flexo printing
Flexo printing is a printing process suitable for high-volume orders. It has high production efficiency and can easily connect a variety of processing modules on flexo printing machines, such as cold stamping, screen printing, simultaneous printing on the front and back sides, offset printing, and round printing. Die cutting, glazing, etc. With the technological advancement of the flexographic printing process, the quality of flexographic products has been greatly improved. For high-end flexographic printing equipment such as Gallus and Omit, the whole machine adopts shaftless transmission, and the plate roller adopts air-lifting sleeve structure, without gears, and shoulder iron. The plate roller has no gears to reduce some of the problems caused by the gears, such as the ink bar, hard port, etc., and the device can run faster. In the form of walking roller shoulders, the pressure can be automatically adjusted. For example, during acceleration and deceleration, it will automatically press and automatically pressurize, which can reduce the inaccuracy of overprinting. The printing roller and the UV curing roller adopt a separate design, that is, a four-roll structure, which is a commonly used method in high-end flexographic printing equipment in the world. The bottom roller adopts a constant temperature water cooling device, which does not cause the printing material to shrink due to the high temperature generated by the UV curing, so that the overprinting is inaccurate, so that the printing range of the flexo printing is more extensive, and it can be applied to the printing of the plastic film material.
Offset + flexo to complement each other
As a company, the goal is definitely to reduce costs, increase profits, improve the company's differentiated competitiveness, obtain more orders, and occupy the leading position in the industry. How to achieve it? For the printing plant, the main way is to invest in equipment and improve the level of technology.
The above content is selected from the 7th issue of “ Printing Technology ” of Keyin Media in 2016. For more journal content, please pay attention to the journal channel .
About Liyang:
Liyang Paper Products Co., ltd is a factory and trade company located in Dongguan, China. Specialized in producing gift paper packaging, such as gift box,paper box, paper bag, book printing, notebook, folder, jewelry boxes, paper tags, jewelry tags,sticker,envelope, etc.
Custom made base on your design is welcome, feel free to contact Liyang printing with your full details.
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