Texturing and Surface Finishing for Injection Molds

Texturing and Surface Finishing

Surface texture dramatically affects the appearance, feel, and functionality of injection molded parts. Chinese mold makers offer a wide range of texturing and finishing options, from chemical etching to laser texturing.

Chemical Etching (Acid Etch)

Most common method. Mold surface is etched with acid to create texture. The SPI texture range and Yick Sang texture numbers are widely referenced in Asia for automotive interior and consumer products.

Laser Texturing

Emerging technology in China. Direct laser ablation creates precise textures. Advantages: no chemical waste, finer control, repeatable to +/- 5% depth. Limited availability but growing rapidly.

Texture Standards

Chinese factories commonly reference: Yick Sang (Hong Kong), Mold-Tech (US) standards, and SPI surface finish standards (A1-D3). Always provide a physical texture reference plaque along with texture number for accurate matching.

Design Considerations

Texture depth affects draft angle: 0.001 inch texture depth = 1 degree draft minimum per side. Deeper textures require more draft. Texture hides minor cosmetic defects but can trap dirt in deep recesses.