Cargo that passes every test in Mumbai can still disappoint on arrival. Nothing was substituted and nothing was mislabelled, the container simply spent four weeks doing what containers do, and the packaging was not specified to survive it.
Container rain is the main enemy
A steel box crossing from the Arabian Sea to Northern Europe passes through large daily temperature swings. Warm, moist air inside the container meets a roof that cools overnight, the dew point is reached, and condensation forms and drips back onto the cargo. The moisture comes from the goods themselves, from wooden pallets and dunnage, and from the humid air sealed in at the moment of stuffing.
The countermeasures are unglamorous and effective: pack below the specified moisture ceiling rather than at it, line the container with kraft paper, hang calcium-chloride desiccant bags rated for the volume and voyage length, use dry pallets, and avoid stuffing in the middle of a monsoon downpour with the doors open. Clumping, caking and mould on arrival are almost always a condensation story rather than a supplier-quality story.
Bags, liners and the inner barrier
The outer bag carries the weight; the inner liner protects the product. Specify both.
- Powders: 25 kg multi-wall paper bags with a food-grade polyethylene inner liner, heat-sealed rather than folded. For high-value or oxidation-prone powders such as moringa, a metallised or aluminium-laminate inner adds a light and oxygen barrier that plain polyethylene does not.
- Whole spices and grains: woven polypropylene with a liner, or jute where the destination or the buyer prefers it. Jute breathes, which helps some commodities and hurts others.
- Very high-value goods: saffron in sealed, tamper-evident tins inside cartons, with lot codes on the tin rather than only on the carton.
Palletised or floor-loaded
Floor loading fits more cargo into the same box and is common out of India. Palletising costs volume but discharges in a fraction of the time, and many European and UK warehouses now require it. If you palletise, the wood must carry an ISPM-15 heat-treatment mark or the pallets themselves become the reason for a hold.
Payload is the other constraint, and it is rarely the container that limits you. Light, bulky powders fill the volume long before they reach the weight limit, while dense pulses hit weight first. Road weight limits at the destination often cap what a 20-foot container may legally carry inland, well below what it could physically hold. Confirm your inland limit before agreeing a loading plan.
Shelf life is decided before the container, not by it
An 18 to 24 month shelf life is a claim about the product as packed. What erodes it is moisture at packing, oxygen, light, heat and surface area. Finer grinds oxidise faster because there is more of the product exposed. Green leaf powders fade, turmeric loses colour value, volatile-oil content in cumin and other seed spices declines. None of it is dramatic over four weeks at sea if the packaging is right, and all of it accelerates if the goods sit in a hot port yard in an unlined box.
What to put in the purchase order
- Maximum moisture at packing, not at harvest.
- Full packaging specification: bag type, weight, liner material and gauge, sealing method.
- Container preparation: kraft lining, number and rating of desiccant bags, dunnage condition.
- Pallet type and ISPM-15 marking, or an explicit floor-load instruction.
- Stuffing photographs and the seal number sent on the day of loading.
- A retained counter-sample from the shipped lot, held for the stated shelf life.
Six lines in a purchase order, and they resolve most of what buyers otherwise argue about after arrival.
Every Aikyam shipment leaves with stuffing photographs, the seal number and a retained sample. See the full catalogue for packing options by product.