Carton Strength and Inner Boxes
Individual inner boxes protect the product; the master carton protects the stack. Look for a stated ECT (edge crush test) value and a realistic stacking height — cartons sit eight to ten high in containers, and the bottom box carries all of it. A drop test report from real handling heights tells you more than any specification sheet. Inner boxes should hold the faucet fixed, not padded loosely: movement inside the box, not external pressure, causes most chrome scratches.
Moisture and Surface Protection
Inside a container, humidity swings hard between day and night. A sealed PE bag around each faucet, silica gel inside the inner box, and scratch film on visible PVD and matte black surfaces are inexpensive defenses. Condensation is worst on the container walls, so faucets should never be packed against them — palletizing with an air gap is the simple fix.
- Sealed PE bag + silica gel in every inner box
- Scratch film on PVD, matte black and brushed visible surfaces
- Foam corners to stop spout-to-box contact
- Never stack master cartons directly against container walls
| Protection layer | Purpose | How to verify |
|---|---|---|
| Fixed-fit inner box | Stops in-box movement, prevents scratches | Drop test at handling heights |
| PE bag + silica gel | Blocks condensation humidity | Humidity chamber trial / spot checks |
| Master carton (ECT) | Carries 8–10 high stacking load | ECT report + stacking trial |
| Loading plan & photos | Controls handling and claim evidence | Photo record of each layer |
Container Loading Plans
Decide palletized versus loose loading early: pallets cost floor space but unload fast and reduce handling damage. Mixed loads need thought — heavy stone or tile goods should never ride on faucet cartons. Photograph the loading process; in a claim dispute, photos of clean, dry, well-stacked loading are decisive evidence. A loading plan shared with the factory in advance — carton counts, stack heights, which SKUs go where — turns the last day of production from chaos into a checklist.
FAQ
Palletized or loose loading — which is better?
Loose loading maximizes pieces per container; palletizing trades about 10–15% of space for faster unloading and less handling damage. For premium finishes and long inland legs, pallets usually pay for themselves.
How much silica gel is enough?
A common rule is 1–2 units of desiccant per inner box for ocean freight, adjusted for transit season and destination humidity. For high-value PVD orders, container-level desiccant blankets add cheap insurance.
Is there a standard for packaging drop tests?
Yes — ISTA 3A simulates parcel and LTL handling, and ASTM D4169 covers distribution cycles. Ask which sequence the factory’s report actually followed; a generic "passed drop test" line proves little.
Who is responsible for transit damage?
It depends on the Incoterm. Under FOB, risk passes at the ship’s rail — which is why documented loading photos and pre-shipment inspection matter: they draw the line between factory quality and carrier handling.
References
- https://www.ista.org
- https://www.astm.org
- https://www.iso.org
- https://iccwbo.org
Conclusion
Packaging is the last quality gate your product passes through. Fixed inner boxes, sealed moisture defense, verified carton strength and a photographed loading plan turn the harshest month of transit into a non-event — and keep the margin you planned to keep.
