# 25 kg vs 1-Ton Jumbo Bags: Safe Carbon Packaging

> Source: https://www.yelicarbon.com/blog-packing.html

The right packing protects your carbon from moisture, breakage and loading losses — and it changes your freight cost, your handling and your warehouse workflow.

[Plain 25 kg export bag with no printed logo]

**By the YELI Technical Team** · Updated September 2026 · 6 min read

Most buyers choose activated carbon on price and specification — and then let the packing be an afterthought. That is backwards. Between the factory floor and your plant, the packaging is the only thing standing between the carbon and the elements. A container can spend 30 days at sea with temperature swings of 30°C. Here is how to think about it.

**Safe carbon packaging** means protecting the adsorbent from the three things that damage it between factory and plant: moisture, breakage and contamination. Activated carbon is a strong adsorbent, so even a small moisture pickup during a **30**-day sea voyage adds payable weight and can slow the first hours of adsorption. The two standard export formats are **25 kg** laminated PP bags on pallets and **500–1000 kg** jumbo bags (FIBC). A **20 ft** container typically carries **18–20 t** of bagged carbon. The right choice is the one that matches your handling, your warehouse and your freight budget.

## The Two Standard Options

For granular activated carbon (GAC), the two workhorses are 25 kg PP woven bags with an inner PE liner, and 500–1000 kg jumbo bags (FIBC). Powdered carbon and specialty grades often ship in drums. There is no universal "best" — it depends on your handling setup, your port and your end-use.

| Criteria
| 25 kg laminated PP bags
| 500–1000 kg jumbo bags (FIBC)
|

| Handling
| Manual handling is easy; individual bags can be sampled, weighed and dosed by hand.
| Forklift or crane required; best for silos, conveyors and continuous dosing systems.
|

| Loading time
| Palletizing and loading a 20 ft container typically takes a full working day.
| A forklift can load or discharge a container in a couple of hours.
|

| Loss / contamination risk
| Damage is contained to one bag; torn bags are easy to spot and replace.
| One damaged jumbo exposes a large quantity; once opened, the remaining carbon stays exposed.
|

| Storage
| Stacks flat on pallets; needs a dry, covered warehouse.
| Fewer units and less floor space; needs lifting gear and a clean, dry pad.
|

| Moisture protection
| Inner PE liner per bag plus shrink-wrapped pallet; desiccant can be added per pallet.
| Inner liner plus optional desiccant; a large opening exposes more carbon after first use.
|

| Cost per ton
| Higher packaging cost per ton; smaller order quantities stay practical.
| Lower packaging cost per ton; typical for larger program volumes.
|

| Container fit
| A 20 ft container typically fits 18–20 t of palletized bags.
| Similar tonnage per 20 ft container in fewer, heavier units; faster discharge.
|

## 25 kg Bags: Flexible, But Watch the Pallets

25 kg bags are the most common export packing. They suit plants that dose carbon regularly, allow easy sampling of individual bags, and are simple to store. The critical detail is the pallet: bags should be palletized and shrink-wrapped so they arrive as one stable unit, not a pile of loose bags that shifted in transit. A standard 20 ft container takes roughly 18–20 tonnes of palletized 25 kg bags.

## Jumbo Bags: Lower Freight Cost, Less Handling

For bigger operations, 1-ton jumbo bags reduce per-bag packaging cost and speed up unloading with a forklift — a full container can be discharged in a couple of hours instead of a day. The trade-offs: you need lifting equipment, and once a jumbo is opened, the carbon is exposed, so plan your transfer into storage silos or drums promptly. Jumbo bags are also the standard choice for buyers who run continuous dosing systems.

## Moisture: The Enemy You Cannot See

Activated carbon adsorbs moisture from humid air. During a sea voyage, condensation forms inside the container as temperature changes. Three layers of protection matter: a dry container at loading, bags with an inner PE liner, and — if the route is very humid — desiccant bags or a moisture barrier on the container floor. Moisture does not destroy the carbon, but it adds payable weight and can slow adsorption in your first hours of operation. Agree upfront how moisture is measured: at loading (factory) or at arrival (port).

## Container Loading: It Starts at the Factory

Ask for loading photos or a short video at the factory. You want to see: pallets centered and braced, no gaps for shifting, doors closed while the goods are still dry, and the container floor clean. For Africa-bound shipments, consolidated containers (multiple buyers sharing one container to ports like Mombasa, Dar es Salaam, Lagos or Tema) are a cost-effective way to import smaller volumes — just confirm how your portion is packed and marked inside the shared container.

> If you only remember one thing: the container door closes at the factory, not at the port. Make sure what you want loaded is what gets loaded.

## Receiving Checklist

On arrival, before signing the release: count the pallets and bags against the packing list, check for torn bags or crushed pallets (photograph everything), take a moisture sample if you are concerned, and store the carbon in a dry covered area. If the shipment is short or damaged, keep the container sealed as far as possible and notify the shipper within the time limit your insurance allows.

## Packing Protects Numbers You Can Verify

Packing only matters if the carbon inside it is right. In plant practice, coconut-shell gold-grade carbon typically tests **96–99%** hardness by the ASTM D3802 ball-pan method (coal-based grades run **90–95%**), with iodine values of **1000–1300 mg/g** and gas-phase CTC of **30–90%**. If bags arrive wet or contaminated, these are the numbers to re-check first: moisture adds payable weight, and common make-up rates of **20–100 g** of carbon per tonne of ore assume the delivered material is dry and clean. A quick abrasion check — fines below **0.6 mm** after fixed agitation — is a useful attrition proxy at the port, before you commit the lot to your circuit.

### Container-Ready Packing at Our Plant

We pack gold recovery carbon in 25 kg export bags and 500–1000 kg jumbo bags at our Longyan factory — palletized, shrink-wrapped and container-ready, with loading photos on request.

Get a Delivered Quote → (https://www.yelicarbon.com/contact.html#quote-form)

## Packing Questions Mining Engineers Ask

Which packing should I choose for my gold plant? +Base it on how you dose carbon. Plants that charge make-up carbon manually or in batches usually prefer **25 kg** bags — they are easy to sample, weigh and tip into a leach tank or carousel. Plants running continuous dosing systems, silos or pneumatic transfer typically take **500–1000 kg** jumbo bags. Many plants use both: jumbos for the initial charge, 25 kg bags for daily make-up.

How do you protect carbon from moisture during sea freight? +Carbon is a strong adsorbent, so moisture protection starts before the container closes. Three layers matter: a dry, clean container at loading; bags with an inner PE liner; and shrink-wrapped pallets. On very humid routes we add desiccant bags and a moisture barrier on the container floor. Agree upfront whether moisture is measured at the factory or at the arrival port.

How much carbon fits in a 20 ft container? +A 20 ft container typically fits **18–20 t** of palletized bagged carbon, depending on bag and pallet dimensions and how the pallets are stacked. Jumbo bags reach a similar tonnage in fewer, heavier units, which speeds up discharge at the port.

Can I mix 25 kg bags and jumbo bags in one shipment? +Yes — mixed shipments are common and practical. Container freight rates have been volatile in 2026, so buyers often split bag sizes to keep flexibility: jumbos for the bulk of the order, 25 kg bags for dosing trials, spare make-up or re-export to a smaller site. Just confirm how each portion is packed, marked and loaded so the packing list matches the container.

## The Bottom Line

Choose packing based on how you handle carbon, protect it from moisture, and verify the load at the factory. Good packing is not an extra cost — it is the difference between receiving carbon ready to run and receiving a problem. If you are new to importing, our factory sourcing checklist (https://www.yelicarbon.com/blog-factory-direct.html) covers the paperwork side of the same journey.

**About YELI Carbon:** we manufacture from our own factory in Longyan, Fujian, China (20+ years, 10,000 m² plant, two activation furnaces). Hardness is tested by the ASTM D3802 ball-pan method, and every batch ships with a COA stating iodine value, hardness, moisture, ash and particle size — the test method is on the certificate.

### Related reading

- Food-Grade Activated Carbon: Decolorization, Compliance and Specs That Matter (https://www.yelicarbon.com/blog-food-grade-carbon.html)

- Activated Carbon for Aquariums & Aquaculture: What It Removes, How Long It Lasts (https://www.yelicarbon.com/blog-aquarium-carbon.html)

Browse all activated carbon products & request a quote → (https://www.yelicarbon.com/products.html)