Start with the handling chain
Packaging should be designed around how many times the cargo will be handled.
A typical China-to-global shipment can involve:
Factory → pickup truck → consolidation warehouse → palletization → port/airport terminal → aircraft/container → destination terminal → customs examination → delivery truck → final warehouse.
Every transfer creates compression, impact, puncture, moisture and misrouting risk.
Carton strength matters
For export cartons, consider:
- Product weight per carton
- Corrugated board grade
- Box dimensions
- Stack height
- Humidity
- Internal void space
- Edge/corner protection
- Tape/strapping method
- Whether cartons will be palletized
A common failure pattern is a large carton with too much empty space. The outer box bends, internal products move, and stacked cartons collapse even though the cardboard looked acceptable when empty.
Right-size cartons before optimizing freight
Reducing carton dimensions can lower volumetric weight, but aggressive downsizing can increase damage.
The correct sequence is:
- Establish required product protection.
- Remove unnecessary void space.
- Standardize carton sizes where practical.
- Test stacking/handling for the real load.
- Recalculate freight using final dimensions.
This is particularly important for air freight, where dimensional weight can control the bill.
When pallets make sense
Palletization can improve forklift handling, reduce individual carton touches and help protect larger shipments.
It can also:
- Increase gross weight
- Increase cubic volume
- Change aircraft/vehicle handling requirements
- Reduce container utilization if poorly designed
For LCL or commercial warehouse delivery, a stable pallet can be worth the additional volume. For some dense cartonized FCL shipments, floor loading may use container space more efficiently. The right choice depends on product, route and receiving requirements.
ISPM 15: when raw wood packaging becomes a compliance issue
ISPM 15 is the international phytosanitary standard for wood packaging material made from raw wood used in international trade. It covers items such as pallets, crates, boxes and dunnage that can carry wood pests.
The IPPC standard provides exemptions for sufficiently low-risk materials, including:
- Wood packaging made entirely from wood 6 mm or less in thickness
- Packaging made wholly from processed wood such as plywood, particle board, OSB or veneer produced using glue, heat or pressure
Raw-wood packaging that falls within the standard generally needs approved treatment and the prescribed ISPM 15 mark under the exporting country's system.
Do not create or reproduce ISPM marks yourself. Use properly treated and marked material from an authorized supplier.
Heat treatment and marking
ISPM 15 recognizes approved treatment/marking systems. The mark identifies compliance and normally includes the IPPC symbol, country/producer codes and treatment information under the standard.
Importers should check the mark on raw-wood pallets/crates before loading, especially when cargo will enter a market enforcing ISPM 15.
Dunnage is often overlooked
Even when cartons sit on compliant pallets, untreated raw wood used as blocking, bracing or dunnage can create a phytosanitary problem.
Crated machinery is a common example: the outer plywood panels may be exempt processed wood, while internal raw timber blocks can still be regulated.
Moisture protection for ocean freight
Containers experience temperature changes that can create condensation (“container rain”).
Packaging plans can consider:
- Dry cargo at loading
- Moisture barriers
- Desiccants where suitable
- Ventilation strategy where appropriate
- Product bagging
- Rust prevention for metal goods
- Dry pallets/wood
The right method depends on commodity and route. Adding desiccants without understanding moisture sources is not a complete solution.
Packaging for fragile or high-value cargo
For glass, furniture, machinery and finished surfaces:
- Use designed internal restraint
- Prevent product-to-product contact
- Reinforce corners/edges
- Protect from fork entry
- Use tilt/shock indicators only where they support a real handling plan
- Photograph packing stages
The best time to fix weak packaging is at origin, before international freight is committed.
China warehouse repacking and consolidation
When several suppliers use inconsistent cartons, a consolidation warehouse can:
- Receive and count cargo
- Measure final dimensions
- Replace damaged outer cartons
- Standardize labels
- Repack selected items
- Palletize
- Consolidate supplier deliveries
- Prepare container loading
China Warehousing & Consolidation
Export packaging checklist
- Carton dimensions and weight finalized
- Carton strength appropriate for stacking
- Void space controlled
- Inner protection adequate
- Pallet decision made intentionally
- Raw wood identified
- ISPM 15 compliance checked where applicable
- Dunnage checked
- Labels applied consistently
- Moisture risk reviewed
- Packing photos retained
- Final CBM updated before freight confirmation
Frequently asked questions
Does plywood need ISPM 15 treatment?
ISPM 15 exempts packaging made wholly from certain processed wood materials such as plywood, particle board and OSB produced using glue, heat or pressure. Mixed packaging can still contain regulated raw wood.
Are all wooden pallets acceptable for export?
No. Requirements depend on destination and the type/treatment of wood. For ISPM 15 markets, use compliant marked raw-wood packaging from authorized sources.
Is palletization always better?
No. It improves handling for many shipments but can increase weight/CBM and reduce container utilization. Decide based on cargo and route.
Can a freight forwarder repack supplier cartons?
Where warehouse services are available and agreed, yes. The exact scope should be defined before cargo receipt.
Official reference
Part of the China Warehouse & Consolidation hub — see the wider freight planning map.
