The following is a brief introduction to these printing methods:
Offset Printing
Principle: This is an indirect printing method. First, the ink on the graphic plate is transferred to the rubber drum, and then the rubber drum transfers the ink to the surface of the printing material.
Advantages: high printing quality, excellent color reproduction, can achieve rich, delicate color effect, often used for printing high-quality product packaging, publicity albums, books, etc. It is suitable for mass printing and the printing speed is relatively fast, which can effectively reduce the unit cost.
Application scenario: For degradable packaging bags that require high-precision images and colors, such as when brand owners require exquisite product pattern display or complex color combinations, offset printing is a good choice.
Letterpress Printing
Principle: The graphic part is higher than the blank part, when printing, the raised graphic part is inked, and then the ink is directly printed on the printing material.
Advantages: Can produce a unique printing texture, thick ink, can give a retro, classic visual feeling. For some need to highlight the text or simple pattern three-dimensional packaging is very effective.
Application scenario: If the degradable packaging bag wants to create a simple, artistic style, or focus on key elements such as the brand name and logo, letterpress printing can add a unique charm.
Flexographic Printing
Principle: The use of flexible printing plate, through the mesh roller transfer ink, the image transfer to the printing material. It can use water-based ink, which is suitable for the environmental properties of degradable packaging bags.
Advantages: The ability to print on a variety of different material surfaces, including plastic, paper, etc. Moreover, its printing speed is fast, the production cost is low, and it is an efficient printing method.
Application scenario: In the mass production of degradable packaging bags, especially when simple, bright patterns and text printing are required, flexographic printing can quickly and economically complete the task while meeting environmental requirements.