1. The 5 Mandatory Pre-Shipment QC Test Gates at Vella
| QC Gate | Test Equipment & Standard | Exact Operating Condition | Pass / Fail Acceptance Threshold |
|---|---|---|---|
| Gate 1: Vacuum Chamber Seal Test | ASTM D4991 / Acrylic Vacuum Chamber | Fill 80% colored water, torque to spec, invert at -0.08 MPa (-80 kPa) for 15 minutes | 0 bubble streams · <0.05% weight loss · Defect rate ≤ 0.5% |
| Gate 2: Thermal Compatibility Soak | Programmable Climatic Ovens | +48°C × 30 days, -15°C × 7 days, plus 5 freeze-thaw cycles with client formula | Zero bulb swelling (<2%), zero acrylic crazing, ΔpH < 0.2, ΔWeight < 1.0% |
| Gate 3: 100-Grid Cross-Hatch Adhesion | ISO 2409 / ASTM D3359 + 3M 810 Tape | 1 mm × 1 mm 100-square lattice cut through spray/print/foil; 45° rapid pull | ASTM 5B / ISO Class 0 (0% ink, spray, or hot-foil flaking) |
| Gate 4: Actuator & Hinge Fatigue | Automated Pneumatic Cycle Rig | 1,500 continuous strokes on airless/lotion pumps; 300 cycles on compact hinges | Zero spring fatigue, zero dose drop (>95% of nominal), zero hinge cracking |
| Gate 5: Transit Drop & Polariscope | ISTA-3A Drop Tester & Polariscope | 76 cm (30 inch) 6-face + 1-corner drop on concrete; glass stress retardation check | 0 glass breakage · Annealing stress ≤ 22.8 nm/cm (Grade 1–2) |
Request Physical Bottling & Pump Compatibility Sample Kit + 24h Tiered FOB Quote (48h DHL Dispatch)
Managed directly by Alex Gao (Managing Director, Vella · Guangzhou Yanchuang Packaging Co., Ltd. · USCC 91440111MA59DBE04B · [email protected] · WhatsApp +86 139 2512 2895). Low trial MOQs (~500–1,000 pcs stock, ~2,000–3,000 pcs custom Pantone with cross-component ΔE <= 1.5), -0.08 MPa vacuum leak testing, and 30/40/30 100% client mould ownership.