With the continuous deepening of the concept of low-carbon economy, the development of green printing has become the development direction of the printing industry. It can be said that only by implementing the green printing process can the enterprise achieve a double harvest of economic and social benefits; only by developing a green printing production model can the enterprise continuously improve the competitiveness of the market and thus survive and develop better. Therefore, we should correctly understand the importance and necessity of developing green printing processes from a strategic perspective, correctly handle the relationship between the immediate interests and long-term interests of enterprises, and formulate business strategies and goals that are in line with the development direction of green and environmental protection, so that enterprises The core competitiveness of the company has been improved, and it strives to become a veritable environment-friendly enterprise, making real contributions to the sustainable development of Chinese society.
1. Understanding and understanding of green printing process
At present, green printing has been heated up by the society and industry, and it has a strong atmosphere. So, what exactly is green printing production? I think maybe it is because organizations that pay attention to the ecological environment often use green as the representative color. Therefore, green is synonymous with environmental protection, health, pollution-free and energy saving. Then, according to the author's knowledge and understanding, the so-called green printing process should refer to the use of new technologies, new equipment, new materials, new processes, new methods to achieve better use and saving of raw materials, reduce printing production consumption, and promote production The simultaneous improvement of efficiency and product quality can help protect the ecological environment and reduce environmental pollution, and better protect the health of the human body. In this sense, the green printing process is a systematic project, which involves a wide range of areas, including not only the technical innovation, transformation and rational design of equipment, workshops and related supporting facilities, but also paper, ink, varnish, Improvement and expansion of performance and adaptability of printing consumables such as blankets, rubber rollers, fountain solution, and additives. In addition, the application of scientific methods and means to technological innovation of traditional operating methods and production process methods to reduce production costs, improve production efficiency and product quality, this is also an important way to achieve green printing process. Therefore, to change to the direction of green printing process, the most important thing is to change the concept of production management and production management, and change the traditional backward production process.
2. Scientific planning and design of the production environment
The practice shows that whether the printing factory's production environment is suitable has a greater impact on production costs, production efficiency and product quality. Therefore, the scientific and rational design of the production process flow and workshop layout is very important. This requires that the raw materials, scraps, semi-products and finished products between the upper and lower processes in the production process should be kept at the most convenient and shortest distance Flow state, so that the frequency of use of elevators or forklifts can be reduced, and valuable energy is better saved. Then, considering that the main features of printing and processing of carton and color box products are base paper, semi-finished products, and finished products, which occupy a large area, bulky materials, and large production quantities, and also require paper cutting, glazing, laminating, bronzing, and stamping. Supporting production processes such as cutting, therefore, the layout design of the plant should consider the following processing equipment such as printing and base paper warehouse, paper cutting, glazing, calendering, laminating, bronzing, die cutting, etc., to be rationally arranged in the form of assembly line operations , In order to reduce the labor required for the material flow in the production process and the cost of transportation vehicle input. For machines that print fine, high-end color prints, it is best to separate the presses with glass walls and install air conditioning equipment separately, which not only provides a constant temperature and humidity printing effect, but also prevents the deformation of the base paper and improves the product's Overprint accuracy reduces the rate of non-conforming products. In addition, for offset presses that use powder spray anti-sticking and alcohol dampening, exhaust and dust extraction devices should be installed to reduce pollution in the production environment, which is also conducive to protecting the health of production operators and ensuring the printing quality of products. Therefore, through the optimized design of the printing production environment, the production process is developed in the direction of green environmental protection, which is also a problem that printing factories should consider when organizing production.
3. Pay attention to the development of the emerging plate-making process
The traditional offset printing plate-making process takes a lot of manpower and material resources from the output, development and fixing of the film to the exposure, development and revision of the plate production, and because of the discomfort of the plate characteristics during the printing process, There are many examples of the increase in paper consumption. The use of a new CTP plate-making process not only reduces the discharge of waste liquid that is more harmful to the human body and the environment, but also eliminates the harm of ultraviolet light to the human body and the pollution of the air, bringing a good news to environmental protection. The CTP plate made by thermal or purple laser plate making can save the film film making process, reduce the intermediate level of the production process, and help to improve the plate making production efficiency and product copy quality. However, due to the thermal or violet laser plate-making, after exposure and imaging, it still needs to undergo chemical development and water rinse process. The production requires chemical developer and tap water. Therefore, from a low-carbon environmental protection perspective, It still has something unsatisfactory. Therefore, if there is a factory that intends to develop a new plate-making process, consider developing an environmentally friendly CTP plate-making process without processing plates. This process only has the simple and fast operation processes of plate ablation waste removal and coating with protective glue. From this point of view, the treatment-free CTP plate is more prominent in environmental protection than the thermal or violet laser CTP plate. In general, no matter which CTP plate-making process is adopted, compared with the traditional plate-making process, they all have obvious technical advantages and market application potential. In particular, they can shorten the plate-making production cycle, increase the plate-making production efficiency, and reduce the plate-making The overall cost of production links, so CTP is the new direction of the current and future printing industry to achieve green printing platemaking.
4. Pay attention to the check and control of production technology
For the printing production process, whether the technical check and control are in place is not only related to production efficiency and product printing quality, but also directly affects the consumption of raw materials and production costs. Therefore, in the process of organizing production, we should pay attention to analyze the structure of the product and the characteristics of the production process, and then scientifically and rationally formulate the printing production process according to the product structure, the characteristics of the substrate and the performance of the machine. For example, for some field layout products that are sensitive to ink skin, in order to avoid the problem of printing ink skin defects, which causes many unqualified products and large base paper consumption, you can take advantage of the multi-color printing machine to split the field version Do two overprints to complete, so that the ink skin defects in the first printed solid layout, after the second solid layout overprint, the ink skin defects are significantly reduced or even disappeared, so that the product's printing pass rate is greatly improved Too. As another example, printing a flat screen color block that contains four-color plate overprinting is most likely to cause printing mottling, color difference, or ink bar quality defects, resulting in product failure and scrapping. In the past, the author encountered such problems in quality management: the use of four-color flat-screen printing of packaging products containing color blocks showed obvious ink bars, mottling and color aberration, which caused some unacceptable consequences of scrapping for customers of some printed products. . In this regard, after comparative analysis, the author changed the four-color flat screen color block in the original layout to a color block for printing spot colors. In this way, the printing ink bars, mottling and color difference will be better overcome. Quality is recognized by customers. Therefore, the author believes that when accepting orders and arranging production processes, we must carefully consider the characteristics of the products and determine a scientific and reasonable process technology plan to avoid the loss of raw materials caused by the blindness of the production process.
5. Pay attention to select the appropriate printing process according to the characteristics of the product
For printing products with different characteristics, adopting the appropriate printing process can reduce the production consumption and achieve the effect of saving raw materials and energy.
①The printing process should be selected according to the printing area of ​​the product layout. Some products have a small number of prints and only print a few square centimeters of printing area. For this reason, if the printing factory has light-weight relief or flexo printing equipment, you can consider making resin plates for printing, which not only has low plate-making costs, but also Printing energy consumption is also low, which can better balance production efficiency and product printing quality.
â‘¡Choose the appropriate printing process according to the number of products. For those orders that are printed in large quantities and are produced on a yearly basis, it is best to consider printing with a web offset or flexo printing machine, so that printing can save the bite of the paper edge, thereby greatly improving the use of base paper rate. If there is a back-mounted product, the adhesive material can also be saved. Therefore, a reasonable choice of printing production technology saves raw materials, which not only meets the development direction of low-carbon printing production, but also improves the profit of printing production.
â‘¢ Select the appropriate printing process according to the performance of the printing material. Some special paper printing products with poor ink absorption have a solid printing surface on the surface. If the offset printing process is used, due to the limitation of oil-water repulsion and the principle of water-ink balance, the amount of ink coating is difficult to make the solid version of the paper Saturated state, and only the laser printing process, relief printing process or screen printing process can make the field printing of special paper achieve the quality effect of saturation. Therefore, for printing on solid plates or products containing text on special paper with poor ink absorption, it is best not to use offset printing process, but to use relief printing process or screen printing process for printing as appropriate. However, if the field version contains small text, it is best to split the text and field version into two plates and print them separately, so as to better prevent the occurrence of printing paste.
â‘£The large-format printing process should be adopted reasonably according to the product structure and quantity. According to the product structure and quantity, the rational application of large-format printing machines is also the choice to achieve green printing. Some printing factories think that large-format printing machines are used to print long-term printed products without considering the structure of the products. The result is counterproductive. Not only does it not improve production efficiency and product quality, but also greatly increases production consumption. Therefore, large-format printing machines are most suitable for printing carton products and other large-format printing products. If you do not consider the characteristics and structure of the product, and only consider the large number of prints unilaterally, you will need to die-cut small-size cartons, paper bags or other small-size trademarks that need to be cut and die-cut, and compare the precision of layout printing Products with high thickness and relatively thin materials are all assembled into large-format printing. Then, for such a blind printing process, not only is it easy to affect the production efficiency and quality of subsequent die cutting, cutting or punching, but also As a result, the consumption of base paper increases, and some products may even be scrapped because the quality does not meet the standard requirements. Therefore, the author believes that large-format printing machines are suitable for printing in large batches, and should also have the characteristics of large finished product specifications and thick paper products in order to maximize the effectiveness of the equipment and production efficiency.
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