Local products refer to agricultural products with excellent quality or specially famous processed products in a certain place. As far as Sichuan is concerned, there are zhangfei beef, Tongjiang tremella, Hanyuan pepper, Pujiang kiwi fruit, green red Crisp Plum, old cured meat, Shu embroidery and other agricultural products. Different from the gift box packaging of other products, native products have their own characteristics. It needs to blend local characteristics for innovative planning and production. The basic process and process of traditional native gift box packaging customization mainly include: prepress image and text processing, plate making, printing and post press processing. The following describes several printing methods for a section of local specialty gift box packaging:
1. Offset printing
Offset printing is a kind of printing method that transfers the graphic information on the offset plate to the substrate with the help of blanket based on the principle that oil and water are immiscible. Offset printing plate is also called lithography because the graphic information part is lipophilic and the non graphic part is hydrophilic. The printing plate is almost flat. Offset printing machine is widely used in color printing packaging products. Its features of high printing quality, rich colors and good sense of image hierarchy are sought after by major local specialty brand packaging. High offset printing power can also meet the demand of rapid growth in sales of local specialty gift box packaging products.
2. Flexographic printing
Flexographic printing is a printing method that uses a flexible photosensitive resin plate to transfer ink through the reticle ink transfer spoke. Because the graphic information of the printing plate is protruding, it also belongs to relief printing. Flexographic printing plate is a photosensitive resin plate with a thickness of. Flexographic printing ink layer is thick, between offset printing and gravure printing. The color is stable, the printing power is high, and the ink is green and environmentally friendly. It has been widely used in food packaging. Flexographic printing is rarely used in gift box packaging. The main reason is that the cartons of local products are printed by flexographic printing.
3. Gravure printing
Gravure printing is a printing method in which the depressed graphic plates directly imprint the ink on the substrate. The depth of the printing plate pit determines the thickness and level of the ink. If the pit is deep, the printing ink layer is thicker; On the contrary, if the pit is shallow, the ink layer printed will be thinner. Gravure printing packaging products have a thick ink layer, with an outstanding sense of hierarchy. The ink is bright in color, high in saturation, stable in product quality, high in printing power, and the printing plate is very resistant to printing. It is generally used in the packaging of local specialty cartons and gift boxes with a large demand.
4. Screen printing
Silk screen printing is a printing method that uses the principle that part of the mesh of the screen printing plate can pass through the ink and kneads the ink through the mesh to transfer the ink to the substrate through the technology or semi-automatic scraper. The screen printing ink layer is the thickest of the four printing methods (the ink layer can reach 30-100 UM). The screen printing ink layer has a strong sense of touch and three-dimensional sense, and can make ice flowers and wrinkles. It is widely used in the performance of special texture on the packaging surface of high-grade native gift boxes to improve the layering of native gift boxes.
5. Digital printing
Digital printing is a printing method that directly prints computer graphic information on paper through data conversion and printing equipment. It completely breaks through the basic process of traditional printing and realizes the one-time completion of no printing plate, dynamic data and full-color image. It is a new printing method. No edition and variable information are the biggest features of digital printing. It blends printing, electronics, computer, network, communication and other skills. At present, the digital printing technology has low production power and poor stability. It is mainly used in the development and proofing of packaging and small batch packaging trademark printing. However, the emergence of digital printing skills has greatly improved the development power of packaging. It takes one to two days for the traditional printing method to finish the proofing of packaging, while digital printing takes only about one hour.
6. Post press processing technology
The traditional post press processing technology of gift box packaging mainly includes bronzing, polishing oil, concave convex and die cutting. Post press processing technology can not only improve the level of packaging, but also have strong anti-counterfeiting function, add added value to the product, and give new functions and new life to the packaging of local specialty gift boxes.
With the development and innovation of printing skills, a variety of post press processing technologies have been developed on the basis of conventional post press processing technologies, such as reverse glazing from glazing oil; Cat's eye bronzing, cold bronzing, holographic anti-counterfeiting bronzing, laser micro engraving bronzing, etc. developed from the bronzing process. However, no matter how the post press processing technology is innovated, its primary purpose is to improve the fineness and hierarchy of packaging. The more complicated the post press process, the higher the packaging cost, the longer the printing cycle, and the higher the scrap rate. Therefore, complex post press processing skills are mostly used in the packaging of advanced products.
