Edge and Corner Testing: Sharp Edge and Accessible-Part Review
Edge and corner testing checks whether a product presents sharp edges, pointed corners, burrs, cutouts, or pinching risks during normal use, maintenance, handling, or child-access scenarios. It is commonly used for toys, childcare articles, furniture, appliances, hardware, machine enclosures, and consumer-product accessories.
Common Review Items
| Item | Review focus | Common risk |
|---|---|---|
| Accessible parts | Confirm positions accessible to user fingers, skin, or maintenance personnel | Only front appearance is checked while bottom, internal openings, or service ports are missed |
| Sharp edges | Assess cut edges, stamped edges, glass edges, metal edges, and plastic parting lines | Burrs or sharp edges appear only after mass production |
| Pointed corners | Review corner radius, chamfer, protective cover, and structural transition | Drawings show radius, but real parts still contain sharp points after processing |
| Pinch and snag risks | Check hinges, gaps, moving parts, and protruding structures | Pinch or snag risk appears only in dynamic use scenarios |
| Corrective verification | Record retest results after deburring, chamfering, overmolding, covers, or structural changes | Only one sample is corrected without confirming production consistency |
Report Boundaries
- The report should state sample model, accessibility judgment, test tool, test position, and acceptance basis.
- After material, mold, stamping, cutting, deburring, or assembly-process changes, edges and corners should be checked again.
- Accessibility and criteria may differ between child-use and adult-use products and should be reviewed separately.
- Customer-facing pages should avoid presenting edge testing as a complete risk conclusion for every use scenario.
Green Ark's Recommendation
Green Ark (Shenzhen) Certification Co., Ltd. recommends building an edge and corner defect list during trial production, recording risk positions, corrective actions, and retest results in one table so design, tooling, and quality teams can follow up together.
