Drilling the core is only half the job. Once a sample comes out of the ground, it has to survive a long chain of handling: sorting at the rig, transport over rough mountain roads, temporary storage at the site, palletized shipping to a core shed or lab, and — increasingly — export across borders for analysis or archiving. At every one of those steps, the container holding the sample is doing as much work as the drill that extracted it.
This is where logistics planning and equipment choice start to matter as much as geology. Exploration companies operating across South America — from the Peruvian Andes to sites in Chile and Argentina — are increasingly standardizing around plastic core trays and plastic core boxes precisely because they solve the two hardest problems in this chain: protecting the sample, and making it efficient to stack, store, and move.
Why Core Tray Logistics Deserve Their Own Strategy
It’s easy to think of core trays purely as a storage question. In practice, they sit at the intersection of three separate operational demands:
- Sample integrity — the tray has to protect the core from impact, contamination, and environmental damage from the moment it’s filled to the moment it’s logged.
- Warehouse and core shed efficiency — trays need to stack safely, use space well, and be easy to locate and retrieve.
- Transport and export efficiency — trays that don’t palletize cleanly waste truck and container space, slow down loading, and increase the risk of damage in transit.
Get any one of these wrong, and the cost shows up somewhere else in the project — whether that’s a compromised sample, a bottleneck at the core shed, or freight costs that are higher than they need to be.
Matching Tray Sizes to Core Diameter
Standardizing tray format to drill core diameter is one of the simplest ways to keep logistics predictable. Across the industry, core trays are generally built around a handful of standard diameter classes:
| Format | Typical Core Diameter | Common Use |
| BQ | ~20–37 mm | Smaller-diameter exploration holes |
| NQ | ~37–48 mm | Standard mineral exploration drilling |
| HQ | ~48–65 mm | Larger-diameter geotechnical and mineral cores |
| PQ | ~65–87 mm | Large-diameter cores requiring maximum recovery |
| SQ | 90 mm+ | Specialized, high-diameter applications |
Coreplast’s tray line follows this same logic, with Modelo 1, Modelo 2, and Modelo 3 configured for HQ, NQ, and PQ formats, plus matching separators and lids. Standardizing on known formats means every tray in a fleet stacks, palletizes, and ships the same way — no improvising with mismatched containers when a project scales up.
Palletizing Principles That Apply to Core Trays
Core trays share more in common with general supply-chain logistics than people often assume. The same principles that govern efficient palletizing in any industry apply directly to core storage and export:
- Fixed stacking, where uniform trays of the same size and shape are stacked statically, works best when a project uses a single standardized format — which is exactly why format consistency (BQ, NQ, HQ, PQ) pays off downstream.
- Cross-stacking, alternating orientation layer by layer, adds stability during transport over the rough, winding roads typical of Andean and mountain exploration sites.
- Uniform weight distribution across a pallet reduces the risk of tipping or crushing lower trays — a real concern when trays are stacked several layers high in a truck bed or shipping container.
- Standardized dimensions are what make automated handling (forklifts, pallet jacks) possible in the first place. Irregular or mismatched trays — a common problem with improvised wood or metal boxes — undermine this from the start.
This is one of the clearest advantages plastic core boxes have over wood or metal alternatives: because they’re manufactured to consistent, repeatable dimensions, they behave predictably on a pallet. A stack of Coreplast trays behaves the same way on truck number one as it does on truck number fifty.
Stackability and Nesting: The Logistics Advantage of Plastic
Two properties matter most when it comes to moving core trays efficiently across long distances:
Stacking strength when full. Loaded trays need to hold their shape and support the weight of trays above them without deforming — something wood and cardboard struggle with over time, and metal achieves at the cost of significant extra weight. Coreplast trays are engineered in high-quality polypropylene specifically to stack robustly without added mass.
Nesting when empty. This is where plastic core trays and plastic core boxes have a structural edge that other materials simply can’t replicate. Empty Coreplast trays nest inside one another, dramatically reducing the volume needed to transport empty stock back to a drilling site or to store spares at a core shed. For companies running multiple projects or exporting trays between operations in different countries, that nesting efficiency directly reduces freight volume and cost.
Export Considerations Across South America
Exploration projects in the region rarely operate in isolation — trays, samples, and equipment frequently move between sites, core sheds, and labs across borders. A few factors make plastic the more export-friendly choice:
- Lightweight construction reduces freight weight and cost compared to metal trays, without sacrificing the impact resistance needed to survive long-haul transport.
- No corrosion risk means trays arriving after weeks in transit — potentially through humid coastal ports or high-altitude routes — don’t need inspection for rust or degradation before reuse.
- Chemical inertness protects sample integrity even when trays pass through varied climates and handling conditions during export.
- Durability over multiple cycles means the same trays can make the round trip — site to lab to site again — repeatedly, rather than being treated as disposable packaging.
For companies exporting samples or shipping trays between exploration sites in Peru, Chile, and beyond, these factors compound: less weight, less damage risk, and easier stacking translate directly into lower total logistics cost per project.
Bringing It Together
Core tray logistics isn’t a side detail of an exploration program — it’s a system that touches sample quality, core shed efficiency, and export cost all at once. Standardizing on a consistent format, choosing a material that stacks and nests predictably, and picking a tray built to survive multiple transport cycles are the decisions that keep that system running smoothly.
Coreplast’s plastic core trays and plastic core boxes are built around exactly these priorities: standardized HQ/NQ/PQ formats, robust stacking, efficient nesting, and a lightweight, corrosion-free design suited to the demands of transport and export across South American mining operations.
FAQs
1. What’s the difference between a plastic core tray and a plastic core box?
The terms are often used interchangeably in the industry. In general, “core tray” refers to the open, compartmentalized container that holds core sections in order for logging and storage, while “core box” is sometimes used to describe the same product, particularly when it includes a lid for closed transport or long-term archiving. Coreplast’s trays and matching lids cover both use cases.
2. Can plastic core trays be stacked as high as metal ones?
Yes. High-quality polypropylene trays, like those manufactured by Coreplast, are designed to stack robustly when full, supporting the weight of trays above without deforming — while weighing significantly less than metal equivalents, which reduces strain on transport and storage infrastructure.
3. Why does nesting matter for export logistics?
When core trays are empty — being shipped back to a drilling site or moved between projects — nesting allows multiple trays to collapse into the space of one, cutting the volume (and therefore the freight cost) needed to move them. This is a structural advantage unique to well-designed plastic trays, since wood and metal trays typically don’t nest efficiently.
