What are the packaging and printing processes?

　　Offset printing is ideal for producing visually rich,图文并茂 products such as brochures, books, advertisements, and newspapers—and in the packaging industry, it’s widely used on a variety of paper-based packaging boxes and tote bags.

　　1. Rotogravure Printing

　　Intaglio is a printing technique where images are created by engraving recessed areas into the surface of the printing plate. Ink is then directly filled into these engraved depressions before being pressed onto the substrate, transferring the ink seamlessly. A key feature of intaglio is its thick, sharply defined ink layer, which gives prints a strong sense of depth and texture. Additionally, because intaglio uses uniquely engraved recesses tailored to each product to hold the ink, it is highly resistant to imitation and counterfeiting, making it an exceptionally secure method for anti-counterfeit applications.

　　Intaglio printing is primarily used for printing on flexible packaging and is now widely applied to food packaging bags and packaging pouches in the pharmaceutical industry. It offers a broad range of substrates, including paper, plastic, as well as high-end materials like premium foil packaging paper.

　　2. Offset Printing

　　Offset printing is a printing process developed based on the principle that oil and water repel each other. Unlike other techniques, offset plates don’t feature grooves—instead, all areas lie on the same flat surface. The printed sections of the plate are ink-receptive and water-repellent, while the non-printing areas behave in the opposite way. This selective absorption of oil and water across the plate allows it to achieve a balanced state of water-oil equilibrium on a single, flat plane. Because offset printing doesn’t require etching the surface of the printing plate, it’s cost-effective and well-suited for handling large-volume packaging production. Additionally, the resulting printed images and text appear sharp and fully intact.

　　Offset printing is ideal for producing visually rich,图文并茂 products such as brochures, books, advertisements, and newspapers—and in the packaging industry, it’s widely used on a variety of paper-based packaging boxes and tote bags.

　　3. Screen Printing

　　Screen printing uses a stencil made of mesh with perforations and ink, applying pressure with a squeegee to transfer the design onto the surface. During the process, ink is poured into one end of the screen-printing plate, and as the squeegee evenly glides across the inked area while moving toward the opposite end of the mesh, the ink is forced through the open holes and transferred onto the substrate. One of the key advantages of screen printing is its ability to adhere to objects of various shapes, making it ideal for printing on curved surfaces. Additionally, screen printing allows for the use of diverse inks and coatings—such as light-resistant pigments that can be seamlessly blended into the ink—giving screen-printed products exceptional durability and resistance to fading under sunlight.

　　Silk screen printing is widely used due to its exceptional versatility—practically every surface requiring text-based decoration, such as clothing, footwear, electronics, ceramics, glass, and even floor tiles, is adorned with silk-screened designs. In the packaging industry, silk printing is commonly employed for high-end boxes and bottles, including festive gift boxes, cigarette cases, and wine boxes, among others.

　　4. Letterpress Printing

　　Letterpress printing is the exact opposite of gravure printing: in letterpress, the raised elements—both text and images—are higher than the rest of the plate. You could think of it as a giant "stamp," except that instead of being pressed manually, the printing process is handled by a machine. A key feature of letterpress is its rich, deep ink coverage, which ensures excellent color reproduction even on rough or textured surfaces.

　　Letterpress printing has found applications in trademarks, newspapers, and decorative materials, while in the packaging industry, it is primarily used for printing on flexible packaging—such as cellophane, corrugated paper, paper bags, and plastic wraps.