Surface treatments for paper packaging play a crucial role in enhancing visual appeal, strengthening protective functions, and creating brand differentiation. The core processes can be categorized as follows:

Basic Printing: The Foundation of the Image

• Offset Printing: Accurate color reproduction, delicate layering, suitable for high-volume, high-quality printing.
• Flexographic Printing: Uses environmentally friendly water-based or UV inks, fast speed, a common choice for food packaging.
• Digital Printing: No plate making required, flexible and efficient, perfectly suited for small-batch customization and personalized needs.

Surface Finishing: Enhancing Texture and Visual Appeal

• Lamination: Applying gloss or matte film to enhance gloss or texture, while also providing water and abrasion resistance.
• Varnishing: Local UV varnishing creates a contrast between glossy and matte areas, highlighting key elements and adding a three-dimensional effect.
• Hot Stamping: Using metal foil or other materials to create metallic luster or special textures, instantly elevating the grade and recognition of the packaging.

Functional Coatings: Imparting Additional Properties

• Water and Oil Resistant Coatings: Ensures the integrity of paper packaging when in contact with liquids, commonly used in food packaging.
• Anti-Counterfeiting Coatings: Integrates elements such as holograms and thermochromic materials to protect brand security.
• Tactile Coatings: Provides special textures such as velvet or leather, enhancing user experience and memorability.

Special Processes: Creating Unique Experiences

• Embossing: Creating raised or recessed textures through molds, resulting in a strong three-dimensional tactile effect.
• Laser Cutting: Achieving extremely fine pattern cutting, creating a visual art of light and shadow transparency.

Trends: Integration and Innovation.

Future processes will focus more on composite applications (such as hot stamping + embossing), and move towards intelligent (such as AR interaction) and sustainable (environmentally friendly coatings) directions.

These surface treatments transform ordinary paper into a powerful brand medium, achieving a unity of function and aesthetics in a small space, and are the finishing touch in packaging design.