Processing Technologies and Advantages

• Silk Screen Printing: Suitable for flat and slightly curved plastic parts. It can accurately print logos, parameter marks and multi-color patterns with high color saturation and strong adhesion. The prints won’t peel off easily after long-term use, meeting the needs of product brand display and information transmission.
• Pad Printing: Specializes in irregular, concave-convex and small-sized plastic parts. It can easily cover areas that are hard to reach with traditional printing methods, such as buttons and complex-structured casings. It features high printing precision and clear details, solving the surface treatment problems of products with special shapes.
• Painting: Provides dual functions of "protection + beautification" for plastic products. It can be customized into various textures including matte, high-gloss, frosted, alcohol-resistant, rubber paint and fingerprint-resistant finishes. Meanwhile, it enhances the surface wear resistance, scratch resistance and weather resistance of products, making the products feel more premium and have a longer service life.

Quality Management

Environmental Control

• Paint mist and VOCs are treated with water curtain cabinets and activated carbon adsorption boxes to ensure emission compliance.
• Negative pressure ventilation is adopted, with air exchange of no less than 10 times per hour to control VOCs concentration.
• The temperature is maintained at 20-25℃ and humidity at 50%-65%, with a class 10,000 purification device to prevent dust.

Color Control

• Standard color cards (e.g., PANTONE, RAL) must be used as the reference. A color difference meter is applied to measure and record data, avoiding subjective visual judgment.
• Base Paint are mixed in proportion, with an electronic scale used for weighing (accurate to the gram), and the formula is recorded.

Adhesion Testing (Method Adapted to Process)

• Silk Screen Printing / Pad Printing: 3M tape is used for quick peeling at 45° for 3 times, with no Paint residue or peeling allowed.
• Spray Painting: A cross-cut knife is used to make a 10×10 grid. After tape peeling, the number of peeled grids must be ≤1.

Wear Resistance Testing

• Silk Screen Printing / Pad Printing: A wear tester with 500g weight is used for 50 friction cycles, with no color fading or base exposure allowed. For pad printing, an additional test of wiping with 75% alcohol for 10 times is required, with no peeling or substrate corrosion allowed.
• Spray Painting: A 2H pencil is used for 3 scratches at 45°, with no base-exposing scratches allowed. A 1000g scratch tester is used for 3 scratches, with no base exposure (width ≤0.1mm) allowed. For outdoor products, they need to be placed at 40℃/90% humidity for 48h, with no discoloration (ΔE ≤1.0) or cracking allowed.

Comparison Table of Plastic Painting & Metal Coating Materials/Processes: