3D Cosmetic standards

‌3D Printing Surface Finishing Standards (Client Version · 2025 Update)‌

‌1. Quick Selection Guide‌

Match surface finishing techniques to materials and end-use requirements:

‌2. Surface Finishing Processes‌

1. ‌Blasting‌:

   • Materials: Plastics, Metals

   • Effect: Uniform matte finish, reduces Ra by ‌30-70%‌

   • Cost: CNY 0.5-2/cm²

2. ‌Chemical Polishing‌:

   • Materials: Resins, Titanium Alloys

   • Effect: Mirror-like finish (Ra ≤0.8 μm), may lose ‌0.05-0.2mm‌ in dimensions

   • Compliance: Requires ‌ISO 14001‌ waste treatment certification

3. ‌Resin Infusion‌:

   • Materials: Porous SLS Nylon

   • Effect: Seals pores, increases hardness by ‌20%‌, enhances water resistance

4. ‌Electropolishing‌ (Metal Only):

   • Dimensional Impact: ±0.02 mm

   • Time: 30-120 minutes/batch

‌3. Design Guidelines‌

1. ‌Avoid Untreatable Features‌:

   • Groove/Internal cavity width ≥‌3mm‌ (for tool access)

   • Minimum text embossing height ≥‌0.3mm‌ (prevents blurring after polishing)

2. ‌Balance Function & Aesthetics‌:

   • Friction Parts: Maintain ‌Ra 6-10 μm‌ for lubrication (per ISO 4288)

   • Transparent Parts: Prioritize ‌Nano-Coating‌ (light transmittance ≥92%)

‌4. 2025 Industry Innovations‌

• ‌Laser Nanopolishing‌: Non-contact metal surface refinement, achieves ‌Ra 0.05 μm‌ in ‌5 seconds/cm²‌ (Cost: CNY 8-15/cm²).

• ‌Biodegradable Coating‌: Eco-friendly PLA surface finish (Ra 1.2 μm), compliant with ‌EU REACH 2025‌.

‌5. Acceptance Criteria‌