Current situation and development of cigarette packaging (VIII)
development trend of cigarette package printing
with the improvement of cigarette grade, the decoration design and production of cigarette packages have new requirements, which has affected the development of packaging and printing industry, making it inevitable to improve product grade and add added value through decoration printing. Here, I will review the development of cigarette packaging decoration printing in the past few years, and discuss the technical development and future of the industry with you
the development trend of multi process and multi process is becoming more and more obvious.
over the past few years, cigarette packaging and printing enterprises have gradually formed specialization, which has changed the previous situation that cigarette packaging can be made and processed only by printing plants, and promoted the development of multi process and multi process. As a result, many books and periodicals and small-scale printing enterprises are not equipped with supporting equipment and processes, Or can not adapt to and meet the requirements of cigarette packaging decoration processing and gradually withdraw from the production field
the main feature of multi process is to use gravure printing, offset printing, hot stamping, embossing and other printing and post press processing processes on a product to fully display the characteristics and advantages of various printing processes, and make full use of these advantages to make up for the shortcomings of other printing processes, so as to highlight the quality of the product through process integration
the main feature of multi process is that a printing process is divided into multiple processes on a product. Multi process is mainly to meet the interpenetration between processes, and solve the problems of cross color and gold brightness between color printing
gravure printing mainly has the advantages of smooth ink, consistent color and high brightness of gold printing during full plate printing; The main drawback is that it is difficult to print with eye tone. When the number of lines added is 175 lines/inch, the layer sense of transition color printing is not strong. It also needs to use an electrostatic ink transfer device to ensure that points are not lost. The main advantage of offset printing is that it has rich levels of printing objectives, the number of lines added can reach 400 lines/inch, and the point recovery is good. It is suitable for printing products with transition levels. However, in offset printing, the thickness of the ink layer has a great impact on the hue, which is difficult to control and the color difference is obvious. If a thicker ink layer is required, it needs to be printed twice. The printing has the characteristics of thick ink layer. The three-dimensional sense of the printed matter is strong. The height of the lower workbench of the host and the height of the host are also reduced. The appearance is more harmonious, friction resistant and the product has high added value. However, the production efficiency of general printing equipment is low, and a large peculiar smell will be generated during the production process. The texture of the printed products is very rough. From this, it can be seen that various printing processes have their own advantages and disadvantages. Therefore, it is necessary to study the theme, characteristics and design concepts of the original, design the processing process of the product according to different product needs and in combination with the advantages of various printing processes, and try to avoid the shortcomings of the printing process
with the increase of processing types involved in a product, a product needs to be printed by multiple types of printing machines. In multi process printing, due to the influence of continuous cutting accuracy, the rotary printing machine can only ensure the accuracy of ± 0.2mm in cutting large sheets after printing, while the sheet fed printing equipment shows obvious advantages. It can not only meet the needs of multiple printing, but also facilitate the transfer between various types of printing machines. At the same time, due to the high printing and post-processing accuracy of the sheet fed printing equipment, if the paper deformation of each printing process can be fully considered, the multi process and multi process processing accuracy of the product can be fully guaranteed to meet the product design requirements
new holographic hot stamping solutions appear.
holographic hot stamping process has been applied in the packaging and printing industry for many years, and has been reflected in many cigarette packaging decoration. However, due to the two core problems of hot stamping materials and equipment, it has not developed rapidly. Holographic hot stamping has high requirements for materials. It requires not only high stability of materials, but also stable tension of materials. The requirements for equipment are higher. On the one hand, before studying the material deformation and residual stress caused by expansion caused by humidity, China has not produced ideal hot stamping equipment, which is mainly reflected in that the hot stamping accuracy and speed can not meet the requirements. In addition, it will cause small deformation of hot stamping materials during foil pulling or foil feeding. The accuracy of domestic hot stamping equipment is still difficult to meet the requirements of cigarette package decoration when it is processed and calculated by relevant programs, and the waste in the production process is also large; The hot stamping speed and accuracy of imported hot stamping equipment are ideal, and the hot stamping accuracy can reach 0.10mm, but the equipment price of nearly ten million yuan is also a problem for investors. Both domestic and imported equipment have strict requirements for hot stamping materials. Domestic materials are difficult to be applied to the decoration and printing of high-precision cigarette packs, and the "seam problem" in materials is difficult to be completely solved
with the development of domestic hot stamping equipment and materials, holographic hot stamping has the possibility to find another way. First, after more than 10 years of development, the performance of domestic bronzing machines has been improved, especially the wide spread of automatic bronzing machines, which has greatly improved and expanded the technical level and application range of hot stamping process in the packaging industry. At the same time, with the maturity of domestic technology in electrochemical aluminum hot stamping materials, the effect of hot stamping products has also been significantly improved, and the selection of various colors is more convenient, which can basically meet the needs of packaging and decoration. Second, with the development of UV ink and synthetic ink technology and the increase of printing equipment functions, the technology of printing on the surface of aluminum foil paper and aluminum spray paper is becoming more and more mature, especially the offset printing and printing process, which has made greater breakthroughs in this regard
at present, due to the lack of holographic hot stamping equipment and materials, many packaging and printing enterprises, when encountering similar processes, generally hot stamping colorless or colored laser anodized aluminum on their products first, and then printing four or more colors on anodized aluminum, so as to achieve a similar effect with holographic hot stamping. This kind of laser anodized aluminum should have strong ink adhesion, and generally adopts imported materials. Although the anti-counterfeiting function of this processing technology can not be compared with that of holographic technology, the technology is relatively mature, the equipment is relatively complete, and the printed electrochemical aluminum shows good effects such as hierarchical sense, three-dimensional sense and color saturation. Moreover, during the secondary scanning in the process of copying the product, due to the strong reflectivity of the underlying laser anodized aluminum, it is impossible to directly obtain the specific parameters of various color lines printed on anodized aluminum through the scanner, but it needs a long time of testing, comparison and adjustment to approach the printing effect of the product. If the technical parameters of the product produced by the original manufacturer are not obtained, only the "approximate" effect can be achieved. In this sense, it can also play a strong anti-counterfeiting effect. Moreover, this processing technology will reduce the production cost and greatly reduce the requirements for the production process
the adoption of new materials has become inevitable.
the emergence of new printing materials is endless. The rapid development of cigarette packaging decoration printing in recent years has found a place for many new materials. It is also the wide application of these new materials that makes the decoration of cigarette packs more colorful
1. Paper. Previously, only single papers such as double offset paper, coated paper, gray background whiteboard and white cardboard were used, and few papers were used to reflect the printing effect; At present, double offset paper is rarely used on cigarette packs. Instead, composite paper (including gold card paper, silver card paper, laser card paper, glass card paper, etc.), coated paper, aluminum spray paper, aluminum foil paper and other varieties are added. It has become a necessary means to express or achieve better product effects through paper
2. Ink. The use of ink has changed greatly. With the increase of printing equipment types, great changes have taken place in the traditional offset printing, gravure printing, printing and flexo printing inks. The increase of offset synthetic ink and UV ink has laid a foundation for the use of composite paper; Gravure printing is mainly aimed at customers' requirements for environmental protection and product odor. The use of alcohol soluble (or water-based) inks has been very popular; In order to get special effects such as wrinkles and ice flowers, manufacturers have found their own solutions in terms of ink composition and drying method. Even if the drying speed of ink is controlled, the main idea is similar; Flexo printing has made great progress in the field of food and other commodity packaging due to its use of environmentally friendly ink. At the same time, special inks such as temperature change inks, UV inks and pearlescent inks are increasingly used
3. Post press materials. The laser die-cutting plate has replaced the manual die-cutting plate, and the trace line has been gradually replaced by the "buckle plate" to improve the processing accuracy of products and meet the requirements of packaging machines in different cigarette printing plants for product dimensional tolerance. Different paper should adopt different dimensional tolerances on the packaging machine of a cigarette printing plant that has not changed since the name of the association was established in 1967, so as to meet the requirements of product appearance formability. The embossed concave convex version and hot stamping version of the electric carving gradually replace the corrosive version to improve the fineness of the product and the service life of the plate, so that many fine lines are reflected. At the same time, the hot stamping with concave convex effect has also developed into one-time processing of electric engraving, which not only improves the matching accuracy of hot stamping and pressing concave convex, enhances the three-dimensional sense of the product, but also reduces the increased loss of the process