Sep. 01, 2023
Packaging should not only protect the contents, but also promote the product image and convey product information. All commodities need packaging, and "packaging" is also an important part of commodities. In the field of packaging, due to the light material and high strength of carton packaging, mature printing and post-press technology, and the green and environmentally friendly packaging can be recycled and reused, it has a wide range of applications, especially in food, tobacco, wine, medicine, cosmetics, life Supplies and other industries are widely used, and there are more and more varieties, and the printing production is becoming more and more exquisite.
In terms of carton packaging materials, they vary from corrugated paper to kraft paper, whiteboard, white cardboard, aluminized film cardboard, aluminum foil cardboard, transfer laser cardboard, and then to industrial cardboard. In addition to selecting materials according to the content, it is also necessary to consider the printing process, aesthetics, positioning and other aspects. From the appearance, the packaging of the product can only be obtained if it reflects its unique cultural connotation and gives consumers a pleasing feeling. Better effect, so in the selection of materials must be taken into account.
Most wines are packaged in cartons, and environmentally-friendly cartons are more mature in the application of wines. Most of the high-end wine boxes are made into gift boxes. Taking high-end gift boxes as an example, the surface paper is usually printed, decorated and processed, and then glued to industrial cardboard to form a box. Combination printing is adopted, commonly used is the combination of UV offset printing and screen printing. After the aluminized (laser) film cardboard is printed by the mature UV offset printing process, it can take into account the thickness of the color block and the rich printing layers. After offset printing, UV glazing The combination of unique decorative effects of screen printing (such as wrinkles, snowflakes, refraction, crystal and other artistic effects make the wine box packaging more beautiful), and the process of post-printing hot stamping, embossing, die-cutting and mounting to form a box.
The surface paper used in mid-range wine packaging is basically the same as that used in high-end wine packaging. Post-processing generally only needs to be mounted, embossed, die-cut, and box-glued. Mid-range wine boxes mostly use screen printing, and some use combined printing. They also use offset printing followed by screen printing special ink for finishing. Using combined printing is more economical and environmentally friendly.
If all screen printing is used, the following situations will occur.
1. At present, volatile and dry screen printing inks are bound to be used, but domestic volatile and dry screen inks will produce a large amount of harmful gases during the natural volatilization of solvents, polluting the working environment, and in severe cases, through the pumping of the working environment Even the wind system cannot pump it away in time, which is not good for the health of the operators. If it is necessary to use screen printing, it is best to use more UV inks to reduce the use of volatile and dry solvent-containing screen inks.
2. All screen printing methods are used. There is no problem with the thick ink layer on the box surface. Generally, 305-380 mesh high-tension polyester mesh stretched nets are used to print better, but screen printing has problems in fine overprinting. It is difficult, especially when using UV ink, the paper that has passed through the light curing machine many times has a certain deformation.
At present, water-based inks for screen printing are not used in carton printing. Part of it may be due to problems in the development of inks, and it does not meet the printing requirements of wine box packaging. On the other hand, wine box packaging does not have strict requirements for ink residues, so most screen printing companies that do wine box packaging have not considered using it. If the wine box packaging uses screen printing water-based ink, it will not only make the wine box packaging more green and environmentally friendly, but also completely improve the production environment and protect the health of workers. From the current price of ink, water-based ink is cheaper than other inks, which can reduce costs. Therefore, screen printing companies for wine box packaging should actively and proactively promote the development of water-based inks through communication with customers, innovation in printing processes and technologies, and cooperation with ink manufacturers.
Low-end wine packaging products are generally printed with white board paper offset printing, which does not require high equipment. During the printing process, the thickness of the ink layer can only be used to improve the grade of the product. During the printing process, proper dusting can be used to achieve the purpose of not staining or sticking. , White board paper offset printing products generally require hot stamping, lamination, embossing, mounting (or tile), die-cutting, and pasting post-press processes.
In terms of material procurement, low-grade wine packaging paper is 250-350g/m2 gray-bottomed white board paper with a lower price, and the ink can also be ordinary offset printing ink with a lower price. Anodized aluminum with different effects can be used to improve product quality. At present, the wine packaging products of white paper offset printing on the market are protected by the film coating process to protect the ink layer, waterproof and load-bearing. The glazing process is not applied to the wine box packaging (due to the consideration of the weight of the wine packaging and other factors). Although the current pre-coating film or environmental protection film can improve the working environment, it has a certain impact on the environment due to its refractory nature. .
The rest of environmentally friendly carton packaging such as cigarette packs and pharmaceutical packaging are better used. Although high-end cigarette labels still use paperboard containing aluminum foil, the non-degradable film layer has been removed. High-end cigarette labels generally use silver aluminum foil paperboard and Combination printing such as degradable transfer laser cardboard UV offset printing, single concave machine or screen finishing, although it is difficult in the printing process (high-end cigarette labels are fine products, printing impositions are all in 15 or 18 editions, and the paper is larger , in the process of screen printing and finishing, it is especially necessary to do a good job in the production process control, otherwise after different degrees of deformation, it will increase the difficulty of embossing, die-cutting, etc. in the subsequent process), complex (high-end cigarette labels need special finishing, holographic Hot stamping or printing on hot stamping, indentation, embossing, die-cutting, etc.), there are many materials used, but it is more environmentally friendly in the production process, such as after offset printing, it is the effect of UV varnish or special UV varnish Processing, screen printing are used in UV-type special effect ink. High-end cigarette labels have high requirements on paper and ink. The surface treatment of the paper must match the ink. The ink used must meet the environmental protection requirements of cigarette packs while ensuring printing suitability. The UV varnish used must consider the smoothness of the cigarette pack surface. , ink wear resistance, etc. are suitable for high-speed cigarette pack packaging machines. Screen printing UV-type finishing inks must ensure firm adhesion, thorough drying after printing, and inks that do not fall off on indentations and die-cut edges. Before mass production, it is best to Do the test first, and then mass-produce after meeting the requirements. Other cigarette labels use gravure printing of coated paper and white cardboard, which also have higher requirements for paper and ink.
Offset printing on gray-bottomed white boards and white cardboard is generally used for pharmaceutical packaging. Most of them only need to be polished and polished after printing. Pharmaceutical packaging is more refined than wine packaging. Compared with cigarette labels, the printing and post-press processes are more complex Simple, most of the printing can be completed with four-color ordinary offset printing, and after printing, glazing, polishing and other processes are required. Attention should be paid to the preparation of the process (the control of the whole process must be considered. The imposition should be based on the size of the product while taking into account the most economical use of the paper. In the preparation of the process, one should not lose sight of the other, so as to prevent the paper from being deformed after glazing and high-temperature polishing, and each overprint during die-cutting. Good or found several inconsistencies or the pattern on the cover of a product is not aligned with the pattern on the box body, etc.). The selection of pharmaceutical packaging materials requires higher paper quality indicators.
Cartons are basically the same as pharmaceutical packaging in other daily necessities and cosmetic packaging applications, except that some cosmetic packaging needs to be made of special paper, and some of the special paper have special paper surfaces, such as copper tissue paper, Cailuo paper, etc. The absorbency and adhesion of ink are different, and special paper also has different requirements for the printing methods used (some paper offset printing cannot be printed, etc.), whether it is before printing or post-press processing, sufficient tests should be done to ensure Mass production printing quality and quality requirements for post-process production. When purchasing special paper to make packaging boxes, the above aspects should be fully considered.
Carton packaging is widely used in the field of packaging. According to different packaging purposes, positioning, and different printing processes, different materials are selected. In the procurement of materials, environmental protection materials should also be selected according to different design and decoration effects and printing production processes.
In short, carton packaging is more economical and beautiful than other packaging, and can reflect the internal products to the maximum extent; it is environmentally friendly, and carton packaging can be recycled and reused. As a carton packaging and printing enterprise, although carton packaging is more green and environmentally friendly than other packaging, it still needs attention and further improvement in the following aspects.
(1) The problem of excessive packaging, especially for high-end products (such as high-end alcohol, high-end nourishing medicines, etc.), should start from the source, starting from packaging design and development, so as to achieve simple structure and reduced material weight to avoid excessive packaging.
(2) From the perspective of printing enterprises, actively and proactively use environmentally friendly inks to promote the healthy development of environmentally friendly inks.
(3) For carton packaging, there are quite a few paper products that have aluminum film on the surface or need to be protected by a film-covering process, and the waste still has a problem of long-term degradation (even biodegradable bioplastics, There are still certain recycling problems), printing companies should use technological innovation to try to use film-free transfer paper for printing or use UV glazing for protection, remove the lamination process, and truly realize environmentally friendly cartons.
